Upgraded to preview8

src/Artemis.UI/Screens/ProfileEditor/Panels/Playback/PlaybackViewModel.cs

@@ -59,7 +59,7 @@ public class PlaybackViewModel : ActivatableViewModelBase
             updateTimer.Start();
             Disposable.Create(() =>
             {
-                // updateTimer.Stop();
+                updateTimer.Stop();
                 _settingsService.GetSetting("ProfileEditor.RepeatTimeline", true).Value = _repeating && _repeatTimeline;
                 _settingsService.GetSetting("ProfileEditor.RepeatSegment", false).Value = _repeating && _repeatSegment;
             }).DisposeWith(d);

src/Artemis.UI/Screens/ProfileEditor/Panels/Properties/PropertyGroupViewModel.cs

@@ -179,12 +179,12 @@ public class PropertyGroupViewModel : PropertyViewModelBase, IDisposable
     public void Dispose()
     {
         LayerPropertyGroup.VisibilityChanged -= LayerPropertyGroupOnVisibilityChanged;
-        foreach (ViewModelBase viewModelBase in Children)
+        while (Children.Any())
         {
-            if (viewModelBase is IDisposable disposable)
+            if (Children[0] is IDisposable disposable)
                 disposable.Dispose();
+            Children.RemoveAt(0);
         }
-
         _keyframeSubscription.Dispose();
     }
 }