Fix non-1/1 initial beat divisor control display

osu.Game/Screens/Edit/Compose/Components/BeatDivisorControl.cs

@@ -218,12 +218,17 @@ private void load()
                 }
 
                 AddInternal(marker = new Marker());
+            }
 
-                CurrentNumber.ValueChanged += div =>
+            protected override void LoadComplete()
+            {
+                base.LoadComplete();
+
+                CurrentNumber.BindValueChanged(div =>
                 {
                     marker.MoveToX(getMappedPosition(div.NewValue), 100, Easing.OutQuint);
                     marker.Flash();
-                };
+                }, true);
             }
 
             protected override void UpdateValue(float value)