diff --git a/osu.Game/Beatmaps/WorkingBeatmap.cs b/osu.Game/Beatmaps/WorkingBeatmap.cs
index a2b44aab52..e0a22460ef 100644
--- a/osu.Game/Beatmaps/WorkingBeatmap.cs
+++ b/osu.Game/Beatmaps/WorkingBeatmap.cs
@@ -135,7 +135,7 @@ public IBeatmap GetPlayableBeatmap(RulesetInfo ruleset)
 
         public bool BackgroundLoaded => background.IsResultAvailable;
         public Texture Background => background.Value;
-        protected virtual bool BackgroundStillValid(Texture b) => b == null || !b.IsDisposed;
+        protected virtual bool BackgroundStillValid(Texture b) => b == null || b.Available;
         protected abstract Texture GetBackground();
         private readonly RecyclableLazy<Texture> background;
 
diff --git a/osu.Game/Database/ArchiveModelManager.cs b/osu.Game/Database/ArchiveModelManager.cs
index e9fe943f15..f4f169f27c 100644
--- a/osu.Game/Database/ArchiveModelManager.cs
+++ b/osu.Game/Database/ArchiveModelManager.cs
@@ -59,7 +59,7 @@ public abstract class ArchiveModelManager<TModel, TFileModel> : ICanAcceptFiles
         // ReSharper disable once NotAccessedField.Local (we should keep a reference to this so it is not finalised)
         private ArchiveImportIPCChannel ipc;
 
-        private readonly List<Action> cachedEvents = new List<Action>();
+        private readonly List<Action> queuedEvents = new List<Action>();
 
         /// <summary>
         /// Allows delaying of outwards events until an operation is confirmed (at a database level).
@@ -77,20 +77,26 @@ public abstract class ArchiveModelManager<TModel, TFileModel> : ICanAcceptFiles
         /// <param name="perform">Whether the flushed events should be performed.</param>
         private void flushEvents(bool perform)
         {
+            Action[] events;
+            lock (queuedEvents)
+            {
+                events = queuedEvents.ToArray();
+                queuedEvents.Clear();
+            }
+
             if (perform)
             {
-                foreach (var a in cachedEvents)
+                foreach (var a in events)
                     a.Invoke();
             }
 
-            cachedEvents.Clear();
             delayingEvents = false;
         }
 
         private void handleEvent(Action a)
         {
             if (delayingEvents)
-                cachedEvents.Add(a);
+                lock (queuedEvents) queuedEvents.Add(a);
             else
                 a.Invoke();
         }
diff --git a/osu.Game/Tests/Visual/TestCasePlayer.cs b/osu.Game/Tests/Visual/TestCasePlayer.cs
index 9afb1dd6cd..9e499cb961 100644
--- a/osu.Game/Tests/Visual/TestCasePlayer.cs
+++ b/osu.Game/Tests/Visual/TestCasePlayer.cs
@@ -54,7 +54,7 @@ private void load(RulesetStore rulesets)
                     AddStep(r.Name, () => p = loadPlayerFor(r));
                     AddUntilStep(() => ContinueCondition(p));
 
-                    AddAssert("no leaked beatmaps", () =>
+                    AddUntilStep(() =>
                     {
                         p = null;
 
@@ -64,9 +64,9 @@ private void load(RulesetStore rulesets)
 
                         workingWeakReferences.ForEachAlive(_ => count++);
                         return count == 1;
-                    });
+                    }, "no leaked beatmaps");
 
-                    AddAssert("no leaked players", () =>
+                    AddUntilStep(() =>
                     {
                         GC.Collect();
                         GC.WaitForPendingFinalizers();
@@ -74,7 +74,7 @@ private void load(RulesetStore rulesets)
 
                         playerWeakReferences.ForEachAlive(_ => count++);
                         return count == 1;
-                    });
+                    }, "no leaked players");
                 }
             }
         }
diff --git a/osu.Game/osu.Game.csproj b/osu.Game/osu.Game.csproj
index 3e16e90d06..83ab5534c6 100644
--- a/osu.Game/osu.Game.csproj
+++ b/osu.Game/osu.Game.csproj
@@ -18,7 +18,7 @@
     <PackageReference Include="Microsoft.EntityFrameworkCore.Sqlite" Version="2.1.2" />
     <PackageReference Include="Microsoft.EntityFrameworkCore.Sqlite.Core" Version="2.1.2" />
     <PackageReference Include="Newtonsoft.Json" Version="11.0.2" />
-    <PackageReference Include="ppy.osu.Framework" Version="2018.910.1" />
+    <PackageReference Include="ppy.osu.Framework" Version="2018.913.0" />
     <PackageReference Include="SharpCompress" Version="0.22.0" />
     <PackageReference Include="NUnit" Version="3.10.1" />
     <PackageReference Include="SharpRaven" Version="2.4.0" />