diff --git a/osu.Game.Rulesets.Catch/UI/CatcherSprite.cs b/osu.Game.Rulesets.Catch/UI/CatcherSprite.cs
index e3c6c93d01..025fa9c56e 100644
--- a/osu.Game.Rulesets.Catch/UI/CatcherSprite.cs
+++ b/osu.Game.Rulesets.Catch/UI/CatcherSprite.cs
@@ -22,7 +22,7 @@ public CatcherSprite()
         [BackgroundDependencyLoader]
         private void load()
         {
-            InternalChild = new SkinnableSprite("Gameplay/catch/fruit-catcher-idle")
+            InternalChild = new SkinnableSprite("Gameplay/catch/fruit-catcher-idle", confineMode: ConfineMode.ScaleDownToFit)
             {
                 RelativeSizeAxes = Axes.Both,
                 Anchor = Anchor.TopCentre,
diff --git a/osu.Game.Rulesets.Osu/Edit/Blueprints/Sliders/Components/PathControlPointVisualiser.cs b/osu.Game.Rulesets.Osu/Edit/Blueprints/Sliders/Components/PathControlPointVisualiser.cs
index eb6e3c01e1..175290f7f1 100644
--- a/osu.Game.Rulesets.Osu/Edit/Blueprints/Sliders/Components/PathControlPointVisualiser.cs
+++ b/osu.Game.Rulesets.Osu/Edit/Blueprints/Sliders/Components/PathControlPointVisualiser.cs
@@ -126,8 +126,8 @@ private bool deleteSelected()
                 slider.Path.ControlPoints.Remove(c);
             }
 
-            // If there are 0 remaining control points, treat the slider as being deleted
-            if (slider.Path.ControlPoints.Count == 0)
+            // If there are 0 or 1 remaining control points, the slider is in a degenerate (single point) form and should be deleted
+            if (slider.Path.ControlPoints.Count <= 1)
             {
                 placementHandler?.Delete(slider);
                 return true;
@@ -161,7 +161,7 @@ public MenuItem[] ContextMenuItems
 
                 return new MenuItem[]
                 {
-                    new OsuMenuItem($"Delete {"control point".ToQuantity(selectedPoints)}", MenuItemType.Destructive, () => deleteSelected())
+                    new OsuMenuItem($"Delete {"control point".ToQuantity(selectedPoints, selectedPoints > 1 ? ShowQuantityAs.Numeric : ShowQuantityAs.None)}", MenuItemType.Destructive, () => deleteSelected())
                 };
             }
         }
diff --git a/osu.Game.Rulesets.Osu/Edit/Blueprints/Sliders/SliderSelectionBlueprint.cs b/osu.Game.Rulesets.Osu/Edit/Blueprints/Sliders/SliderSelectionBlueprint.cs
index 7431972673..68873093a6 100644
--- a/osu.Game.Rulesets.Osu/Edit/Blueprints/Sliders/SliderSelectionBlueprint.cs
+++ b/osu.Game.Rulesets.Osu/Edit/Blueprints/Sliders/SliderSelectionBlueprint.cs
@@ -104,7 +104,7 @@ private int addControlPoint(Vector2 position)
             int insertionIndex = 0;
             float minDistance = float.MaxValue;
 
-            for (int i = 0; i < HitObject.Path.ControlPoints.Count - 2; i++)
+            for (int i = 0; i < HitObject.Path.ControlPoints.Count - 1; i++)
             {
                 float dist = new Line(HitObject.Path.ControlPoints[i].Position.Value, HitObject.Path.ControlPoints[i + 1].Position.Value).DistanceToPoint(position);
 
diff --git a/osu.Game.Tests/Visual/SongSelect/TestScenePlaySongSelect.cs b/osu.Game.Tests/Visual/SongSelect/TestScenePlaySongSelect.cs
index a4b8d1a24a..5dd02c1ddd 100644
--- a/osu.Game.Tests/Visual/SongSelect/TestScenePlaySongSelect.cs
+++ b/osu.Game.Tests/Visual/SongSelect/TestScenePlaySongSelect.cs
@@ -95,6 +95,42 @@ public void TestSingleFilterOnEnter()
             AddAssert("filter count is 1", () => songSelect.FilterCount == 1);
         }
 
+        [Test]
+        public void TestNoFilterOnSimpleResume()
+        {
+            addRulesetImportStep(0);
+            addRulesetImportStep(0);
+
+            createSongSelect();
+
+            AddStep("push child screen", () => Stack.Push(new TestSceneOsuScreenStack.TestScreen("test child")));
+            AddUntilStep("wait for not current", () => !songSelect.IsCurrentScreen());
+
+            AddStep("return", () => songSelect.MakeCurrent());
+            AddUntilStep("wait for current", () => songSelect.IsCurrentScreen());
+            AddAssert("filter count is 1", () => songSelect.FilterCount == 1);
+        }
+
+        [Test]
+        public void TestFilterOnResumeAfterChange()
+        {
+            addRulesetImportStep(0);
+            addRulesetImportStep(0);
+
+            AddStep("change convert setting", () => config.Set(OsuSetting.ShowConvertedBeatmaps, false));
+
+            createSongSelect();
+
+            AddStep("push child screen", () => Stack.Push(new TestSceneOsuScreenStack.TestScreen("test child")));
+            AddUntilStep("wait for not current", () => !songSelect.IsCurrentScreen());
+
+            AddStep("change convert setting", () => config.Set(OsuSetting.ShowConvertedBeatmaps, true));
+
+            AddStep("return", () => songSelect.MakeCurrent());
+            AddUntilStep("wait for current", () => songSelect.IsCurrentScreen());
+            AddAssert("filter count is 2", () => songSelect.FilterCount == 2);
+        }
+
         [Test]
         public void TestAudioResuming()
         {
diff --git a/osu.Game.Tests/Visual/TestSceneOsuScreenStack.cs b/osu.Game.Tests/Visual/TestSceneOsuScreenStack.cs
index a68fd0ef40..c55988d1bb 100644
--- a/osu.Game.Tests/Visual/TestSceneOsuScreenStack.cs
+++ b/osu.Game.Tests/Visual/TestSceneOsuScreenStack.cs
@@ -42,7 +42,7 @@ public void ParallaxAssignmentTest()
             AddAssert("Parallax is off", () => stack.ParallaxAmount == 0);
         }
 
-        private class TestScreen : ScreenWithBeatmapBackground
+        public class TestScreen : ScreenWithBeatmapBackground
         {
             private readonly string screenText;
 
diff --git a/osu.Game/Configuration/DatabasedConfigManager.cs b/osu.Game/Configuration/DatabasedConfigManager.cs
index 1ef4c2527a..b3783b45a8 100644
--- a/osu.Game/Configuration/DatabasedConfigManager.cs
+++ b/osu.Game/Configuration/DatabasedConfigManager.cs
@@ -1,6 +1,7 @@
 // Copyright (c) ppy Pty Ltd <contact@ppy.sh>. Licensed under the MIT Licence.
 // See the LICENCE file in the repository root for full licence text.
 
+using System;
 using System.Collections.Generic;
 using System.Linq;
 using osu.Framework.Bindables;
@@ -9,8 +10,8 @@
 
 namespace osu.Game.Configuration
 {
-    public abstract class DatabasedConfigManager<T> : ConfigManager<T>
-        where T : struct
+    public abstract class DatabasedConfigManager<TLookup> : ConfigManager<TLookup>
+        where TLookup : struct, Enum
     {
         private readonly SettingsStore settings;
 
@@ -53,7 +54,7 @@ protected override bool PerformSave()
 
         private readonly List<DatabasedSetting> dirtySettings = new List<DatabasedSetting>();
 
-        protected override void AddBindable<TBindable>(T lookup, Bindable<TBindable> bindable)
+        protected override void AddBindable<TBindable>(TLookup lookup, Bindable<TBindable> bindable)
         {
             base.AddBindable(lookup, bindable);
 
diff --git a/osu.Game/Configuration/InMemoryConfigManager.cs b/osu.Game/Configuration/InMemoryConfigManager.cs
index b0dc6b0e9c..ccf697f680 100644
--- a/osu.Game/Configuration/InMemoryConfigManager.cs
+++ b/osu.Game/Configuration/InMemoryConfigManager.cs
@@ -1,12 +1,13 @@
 // Copyright (c) ppy Pty Ltd <contact@ppy.sh>. Licensed under the MIT Licence.
 // See the LICENCE file in the repository root for full licence text.
 
+using System;
 using osu.Framework.Configuration;
 
 namespace osu.Game.Configuration
 {
-    public class InMemoryConfigManager<T> : ConfigManager<T>
-        where T : struct
+    public class InMemoryConfigManager<TLookup> : ConfigManager<TLookup>
+        where TLookup : struct, Enum
     {
         public InMemoryConfigManager()
         {
diff --git a/osu.Game/Graphics/IHasAccentColour.cs b/osu.Game/Graphics/IHasAccentColour.cs
index 1a66819379..af497da70f 100644
--- a/osu.Game/Graphics/IHasAccentColour.cs
+++ b/osu.Game/Graphics/IHasAccentColour.cs
@@ -24,7 +24,7 @@ public static class AccentedColourExtensions
         /// </summary>
         /// <returns>A <see cref="TransformSequence{T}"/> to which further transforms can be added.</returns>
         public static TransformSequence<T> FadeAccent<T>(this T accentedDrawable, Color4 newColour, double duration = 0, Easing easing = Easing.None)
-            where T : IHasAccentColour
+            where T : class, IHasAccentColour
             => accentedDrawable.TransformTo(nameof(accentedDrawable.AccentColour), newColour, duration, easing);
 
         /// <summary>
diff --git a/osu.Game/Graphics/UserInterface/OsuEnumDropdown.cs b/osu.Game/Graphics/UserInterface/OsuEnumDropdown.cs
index e132027787..528d7d60f8 100644
--- a/osu.Game/Graphics/UserInterface/OsuEnumDropdown.cs
+++ b/osu.Game/Graphics/UserInterface/OsuEnumDropdown.cs
@@ -6,12 +6,10 @@
 namespace osu.Game.Graphics.UserInterface
 {
     public class OsuEnumDropdown<T> : OsuDropdown<T>
+        where T : struct, Enum
     {
         public OsuEnumDropdown()
         {
-            if (!typeof(T).IsEnum)
-                throw new InvalidOperationException("OsuEnumDropdown only supports enums as the generic type argument");
-
             Items = (T[])Enum.GetValues(typeof(T));
         }
     }
diff --git a/osu.Game/Overlays/SearchableList/DisplayStyleControl.cs b/osu.Game/Overlays/SearchableList/DisplayStyleControl.cs
index 0808cc8fcc..a33f4eb30d 100644
--- a/osu.Game/Overlays/SearchableList/DisplayStyleControl.cs
+++ b/osu.Game/Overlays/SearchableList/DisplayStyleControl.cs
@@ -1,6 +1,7 @@
 // Copyright (c) ppy Pty Ltd <contact@ppy.sh>. Licensed under the MIT Licence.
 // See the LICENCE file in the repository root for full licence text.
 
+using System;
 using osu.Framework.Bindables;
 using osuTK;
 using osu.Framework.Graphics;
@@ -11,6 +12,7 @@
 namespace osu.Game.Overlays.SearchableList
 {
     public class DisplayStyleControl<T> : Container
+        where T : struct, Enum
     {
         public readonly SlimEnumDropdown<T> Dropdown;
         public readonly Bindable<PanelDisplayStyle> DisplayStyle = new Bindable<PanelDisplayStyle>();
diff --git a/osu.Game/Overlays/SearchableList/SearchableListFilterControl.cs b/osu.Game/Overlays/SearchableList/SearchableListFilterControl.cs
index 372da94b37..117f905de4 100644
--- a/osu.Game/Overlays/SearchableList/SearchableListFilterControl.cs
+++ b/osu.Game/Overlays/SearchableList/SearchableListFilterControl.cs
@@ -13,7 +13,9 @@
 
 namespace osu.Game.Overlays.SearchableList
 {
-    public abstract class SearchableListFilterControl<T, U> : Container
+    public abstract class SearchableListFilterControl<TTab, TCategory> : Container
+        where TTab : struct, Enum
+        where TCategory : struct, Enum
     {
         private const float padding = 10;
 
@@ -21,12 +23,12 @@ public abstract class SearchableListFilterControl<T, U> : Container
         private readonly Box tabStrip;
 
         public readonly SearchTextBox Search;
-        public readonly PageTabControl<T> Tabs;
-        public readonly DisplayStyleControl<U> DisplayStyleControl;
+        public readonly PageTabControl<TTab> Tabs;
+        public readonly DisplayStyleControl<TCategory> DisplayStyleControl;
 
         protected abstract Color4 BackgroundColour { get; }
-        protected abstract T DefaultTab { get; }
-        protected abstract U DefaultCategory { get; }
+        protected abstract TTab DefaultTab { get; }
+        protected abstract TCategory DefaultCategory { get; }
         protected virtual Drawable CreateSupplementaryControls() => null;
 
         /// <summary>
@@ -36,9 +38,6 @@ public abstract class SearchableListFilterControl<T, U> : Container
 
         protected SearchableListFilterControl()
         {
-            if (!typeof(T).IsEnum)
-                throw new InvalidOperationException("SearchableListFilterControl's sort tabs only support enums as the generic type argument");
-
             RelativeSizeAxes = Axes.X;
 
             var controls = CreateSupplementaryControls();
@@ -90,7 +89,7 @@ protected SearchableListFilterControl()
                                     RelativeSizeAxes = Axes.X,
                                     AutoSizeAxes = Axes.Y,
                                     Padding = new MarginPadding { Right = 225 },
-                                    Child = Tabs = new PageTabControl<T>
+                                    Child = Tabs = new PageTabControl<TTab>
                                     {
                                         RelativeSizeAxes = Axes.X,
                                     },
@@ -105,7 +104,7 @@ protected SearchableListFilterControl()
                         },
                     },
                 },
-                DisplayStyleControl = new DisplayStyleControl<U>
+                DisplayStyleControl = new DisplayStyleControl<TCategory>
                 {
                     Anchor = Anchor.TopRight,
                     Origin = Anchor.TopRight,
diff --git a/osu.Game/Overlays/SearchableList/SearchableListHeader.cs b/osu.Game/Overlays/SearchableList/SearchableListHeader.cs
index 73dca956d1..66fedf0a56 100644
--- a/osu.Game/Overlays/SearchableList/SearchableListHeader.cs
+++ b/osu.Game/Overlays/SearchableList/SearchableListHeader.cs
@@ -14,6 +14,7 @@
 namespace osu.Game.Overlays.SearchableList
 {
     public abstract class SearchableListHeader<T> : Container
+        where T : struct, Enum
     {
         public readonly HeaderTabControl<T> Tabs;
 
@@ -24,9 +25,6 @@ public abstract class SearchableListHeader<T> : Container
 
         protected SearchableListHeader()
         {
-            if (!typeof(T).IsEnum)
-                throw new InvalidOperationException("BrowseHeader only supports enums as the generic type argument");
-
             RelativeSizeAxes = Axes.X;
             Height = 90;
 
diff --git a/osu.Game/Overlays/SearchableList/SearchableListOverlay.cs b/osu.Game/Overlays/SearchableList/SearchableListOverlay.cs
index fb0c1d9808..37478d902b 100644
--- a/osu.Game/Overlays/SearchableList/SearchableListOverlay.cs
+++ b/osu.Game/Overlays/SearchableList/SearchableListOverlay.cs
@@ -1,6 +1,7 @@
 // Copyright (c) ppy Pty Ltd <contact@ppy.sh>. Licensed under the MIT Licence.
 // See the LICENCE file in the repository root for full licence text.
 
+using System;
 using osuTK.Graphics;
 using osu.Framework.Graphics;
 using osu.Framework.Graphics.Containers;
@@ -16,19 +17,22 @@ public abstract class SearchableListOverlay : FullscreenOverlay
         public const float WIDTH_PADDING = 80;
     }
 
-    public abstract class SearchableListOverlay<T, U, S> : SearchableListOverlay
+    public abstract class SearchableListOverlay<THeader, TTab, TCategory> : SearchableListOverlay
+        where THeader : struct, Enum
+        where TTab : struct, Enum
+        where TCategory : struct, Enum
     {
         private readonly Container scrollContainer;
 
-        protected readonly SearchableListHeader<T> Header;
-        protected readonly SearchableListFilterControl<U, S> Filter;
+        protected readonly SearchableListHeader<THeader> Header;
+        protected readonly SearchableListFilterControl<TTab, TCategory> Filter;
         protected readonly FillFlowContainer ScrollFlow;
 
         protected abstract Color4 BackgroundColour { get; }
         protected abstract Color4 TrianglesColourLight { get; }
         protected abstract Color4 TrianglesColourDark { get; }
-        protected abstract SearchableListHeader<T> CreateHeader();
-        protected abstract SearchableListFilterControl<U, S> CreateFilterControl();
+        protected abstract SearchableListHeader<THeader> CreateHeader();
+        protected abstract SearchableListFilterControl<TTab, TCategory> CreateFilterControl();
 
         protected SearchableListOverlay()
         {
diff --git a/osu.Game/Overlays/SearchableList/SlimEnumDropdown.cs b/osu.Game/Overlays/SearchableList/SlimEnumDropdown.cs
index f320ef1344..9e7ff1205f 100644
--- a/osu.Game/Overlays/SearchableList/SlimEnumDropdown.cs
+++ b/osu.Game/Overlays/SearchableList/SlimEnumDropdown.cs
@@ -1,6 +1,7 @@
 // Copyright (c) ppy Pty Ltd <contact@ppy.sh>. Licensed under the MIT Licence.
 // See the LICENCE file in the repository root for full licence text.
 
+using System;
 using osuTK.Graphics;
 using osu.Framework.Extensions.Color4Extensions;
 using osu.Framework.Graphics;
@@ -11,6 +12,7 @@
 namespace osu.Game.Overlays.SearchableList
 {
     public class SlimEnumDropdown<T> : OsuEnumDropdown<T>
+        where T : struct, Enum
     {
         protected override DropdownHeader CreateHeader() => new SlimDropdownHeader();
 
diff --git a/osu.Game/Overlays/Settings/SettingsEnumDropdown.cs b/osu.Game/Overlays/Settings/SettingsEnumDropdown.cs
index 9f09f251c2..c77d14632b 100644
--- a/osu.Game/Overlays/Settings/SettingsEnumDropdown.cs
+++ b/osu.Game/Overlays/Settings/SettingsEnumDropdown.cs
@@ -1,12 +1,14 @@
 // Copyright (c) ppy Pty Ltd <contact@ppy.sh>. Licensed under the MIT Licence.
 // See the LICENCE file in the repository root for full licence text.
 
+using System;
 using osu.Framework.Graphics;
 using osu.Game.Graphics.UserInterface;
 
 namespace osu.Game.Overlays.Settings
 {
     public class SettingsEnumDropdown<T> : SettingsDropdown<T>
+        where T : struct, Enum
     {
         protected override OsuDropdown<T> CreateDropdown() => new DropdownControl();
 
diff --git a/osu.Game/Rulesets/Configuration/RulesetConfigManager.cs b/osu.Game/Rulesets/Configuration/RulesetConfigManager.cs
index ed5fdf9809..0ff3455f00 100644
--- a/osu.Game/Rulesets/Configuration/RulesetConfigManager.cs
+++ b/osu.Game/Rulesets/Configuration/RulesetConfigManager.cs
@@ -1,12 +1,13 @@
 // Copyright (c) ppy Pty Ltd <contact@ppy.sh>. Licensed under the MIT Licence.
 // See the LICENCE file in the repository root for full licence text.
 
+using System;
 using osu.Game.Configuration;
 
 namespace osu.Game.Rulesets.Configuration
 {
-    public abstract class RulesetConfigManager<T> : DatabasedConfigManager<T>, IRulesetConfigManager
-        where T : struct
+    public abstract class RulesetConfigManager<TLookup> : DatabasedConfigManager<TLookup>, IRulesetConfigManager
+        where TLookup : struct, Enum
     {
         protected RulesetConfigManager(SettingsStore settings, RulesetInfo ruleset, int? variant = null)
             : base(settings, ruleset, variant)
diff --git a/osu.Game/Rulesets/Objects/Legacy/ConvertHitObjectParser.cs b/osu.Game/Rulesets/Objects/Legacy/ConvertHitObjectParser.cs
index 1ac7284772..b5b1e26486 100644
--- a/osu.Game/Rulesets/Objects/Legacy/ConvertHitObjectParser.cs
+++ b/osu.Game/Rulesets/Objects/Legacy/ConvertHitObjectParser.cs
@@ -257,14 +257,13 @@ private PathControlPoint[] convertControlPoints(Vector2[] vertices, PathType typ
         {
             if (type == PathType.PerfectCurve)
             {
-                if (vertices.Length == 3)
+                if (vertices.Length != 3)
+                    type = PathType.Bezier;
+                else if (isLinear(vertices))
                 {
                     // osu-stable special-cased colinear perfect curves to a linear path
-                    if (isLinear(vertices))
-                        type = PathType.Linear;
+                    type = PathType.Linear;
                 }
-                else
-                    type = PathType.Bezier;
             }
 
             var points = new List<PathControlPoint>(vertices.Length)
diff --git a/osu.Game/Rulesets/Objects/PathControlPoint.cs b/osu.Game/Rulesets/Objects/PathControlPoint.cs
index 5737d3f618..0336f94313 100644
--- a/osu.Game/Rulesets/Objects/PathControlPoint.cs
+++ b/osu.Game/Rulesets/Objects/PathControlPoint.cs
@@ -30,8 +30,9 @@ public class PathControlPoint : IEquatable<PathControlPoint>
         /// Creates a new <see cref="PathControlPoint"/>.
         /// </summary>
         public PathControlPoint()
-            : this(Vector2.Zero, null)
         {
+            Position.ValueChanged += _ => Changed?.Invoke();
+            Type.ValueChanged += _ => Changed?.Invoke();
         }
 
         /// <summary>
@@ -40,12 +41,10 @@ public PathControlPoint()
         /// <param name="position">The initial position.</param>
         /// <param name="type">The initial type.</param>
         public PathControlPoint(Vector2 position, PathType? type = null)
+            : this()
         {
             Position.Value = position;
             Type.Value = type;
-
-            Position.ValueChanged += _ => Changed?.Invoke();
-            Type.ValueChanged += _ => Changed?.Invoke();
         }
 
         public bool Equals(PathControlPoint other) => Position.Value == other?.Position.Value && Type.Value == other.Type.Value;
diff --git a/osu.Game/Screens/Select/FilterCriteria.cs b/osu.Game/Screens/Select/FilterCriteria.cs
index abcb1f2171..e3ad76ac35 100644
--- a/osu.Game/Screens/Select/FilterCriteria.cs
+++ b/osu.Game/Screens/Select/FilterCriteria.cs
@@ -44,7 +44,7 @@ public string SearchText
         }
 
         public struct OptionalRange<T> : IEquatable<OptionalRange<T>>
-            where T : struct, IComparable
+            where T : struct
         {
             public bool HasFilter => Max != null || Min != null;
 
diff --git a/osu.Game/Screens/Select/FilterQueryParser.cs b/osu.Game/Screens/Select/FilterQueryParser.cs
index ffe1258168..89afc729fe 100644
--- a/osu.Game/Screens/Select/FilterQueryParser.cs
+++ b/osu.Game/Screens/Select/FilterQueryParser.cs
@@ -170,7 +170,7 @@ private static void updateCriteriaRange(ref FilterCriteria.OptionalRange<double>
         }
 
         private static void updateCriteriaRange<T>(ref FilterCriteria.OptionalRange<T> range, string op, T value)
-            where T : struct, IComparable
+            where T : struct
         {
             switch (op)
             {
diff --git a/osu.Game/Screens/Select/SongSelect.cs b/osu.Game/Screens/Select/SongSelect.cs
index a52edb70db..8f7ad2022d 100644
--- a/osu.Game/Screens/Select/SongSelect.cs
+++ b/osu.Game/Screens/Select/SongSelect.cs
@@ -262,8 +262,10 @@ private void load(BeatmapManager beatmaps, AudioManager audio, DialogOverlay dia
 
         protected virtual void ApplyFilterToCarousel(FilterCriteria criteria)
         {
-            if (this.IsCurrentScreen())
-                Carousel.Filter(criteria);
+            // if not the current screen, we want to get carousel in a good presentation state before displaying (resume or enter).
+            bool shouldDebounce = this.IsCurrentScreen();
+
+            Schedule(() => Carousel.Filter(criteria, shouldDebounce));
         }
 
         private DependencyContainer dependencies;
@@ -437,8 +439,6 @@ public override void OnEntering(IScreen last)
         {
             base.OnEntering(last);
 
-            Carousel.Filter(FilterControl.CreateCriteria(), false);
-
             this.FadeInFromZero(250);
             FilterControl.Activate();
         }
diff --git a/osu.Game/Skinning/SkinConfigManager.cs b/osu.Game/Skinning/SkinConfigManager.cs
index 896444d1d2..682138a2e9 100644
--- a/osu.Game/Skinning/SkinConfigManager.cs
+++ b/osu.Game/Skinning/SkinConfigManager.cs
@@ -1,11 +1,12 @@
 // Copyright (c) ppy Pty Ltd <contact@ppy.sh>. Licensed under the MIT Licence.
 // See the LICENCE file in the repository root for full licence text.
 
+using System;
 using osu.Framework.Configuration;
 
 namespace osu.Game.Skinning
 {
-    public class SkinConfigManager<T> : ConfigManager<T> where T : struct
+    public class SkinConfigManager<TLookup> : ConfigManager<TLookup> where TLookup : struct, Enum
     {
         protected override void PerformLoad()
         {
diff --git a/osu.Game/Storyboards/Drawables/IFlippable.cs b/osu.Game/Storyboards/Drawables/IFlippable.cs
index 9e12de5833..1c4cdde22d 100644
--- a/osu.Game/Storyboards/Drawables/IFlippable.cs
+++ b/osu.Game/Storyboards/Drawables/IFlippable.cs
@@ -41,7 +41,7 @@ public static class FlippableExtensions
         /// </summary>
         /// <returns>A <see cref="TransformSequence{T}"/> to which further transforms can be added.</returns>
         public static TransformSequence<T> TransformFlipH<T>(this T flippable, bool newValue, double delay = 0)
-            where T : IFlippable
+            where T : class, IFlippable
             => flippable.TransformTo(flippable.PopulateTransform(new TransformFlipH(), newValue, delay));
 
         /// <summary>
@@ -49,7 +49,7 @@ public static TransformSequence<T> TransformFlipH<T>(this T flippable, bool newV
         /// </summary>
         /// <returns>A <see cref="TransformSequence{T}"/> to which further transforms can be added.</returns>
         public static TransformSequence<T> TransformFlipV<T>(this T flippable, bool newValue, double delay = 0)
-            where T : IFlippable
+            where T : class, IFlippable
             => flippable.TransformTo(flippable.PopulateTransform(new TransformFlipV(), newValue, delay));
     }
 }
diff --git a/osu.Game/Tests/Visual/ScreenTestScene.cs b/osu.Game/Tests/Visual/ScreenTestScene.cs
index 23f45e0d0f..707aa61283 100644
--- a/osu.Game/Tests/Visual/ScreenTestScene.cs
+++ b/osu.Game/Tests/Visual/ScreenTestScene.cs
@@ -12,7 +12,7 @@ namespace osu.Game.Tests.Visual
     /// </summary>
     public abstract class ScreenTestScene : ManualInputManagerTestScene
     {
-        private readonly OsuScreenStack stack;
+        protected readonly OsuScreenStack Stack;
 
         private readonly Container content;
 
@@ -22,16 +22,16 @@ protected ScreenTestScene()
         {
             base.Content.AddRange(new Drawable[]
             {
-                stack = new OsuScreenStack { RelativeSizeAxes = Axes.Both },
+                Stack = new OsuScreenStack { RelativeSizeAxes = Axes.Both },
                 content = new Container { RelativeSizeAxes = Axes.Both }
             });
         }
 
         protected void LoadScreen(OsuScreen screen)
         {
-            if (stack.CurrentScreen != null)
-                stack.Exit();
-            stack.Push(screen);
+            if (Stack.CurrentScreen != null)
+                Stack.Exit();
+            Stack.Push(screen);
         }
     }
 }