Bug Terrible Bug! Hope fix! Timeline window error when diffrent control track control same sub timeline

1. What happened
version:1.7.2, bug reason:TimelineUtility.GetBindingPairsFromDirectors

Timeline window error when diffrent control track control diffrent obj but use same sub timeline

Error Info:
ArgumentException: An item with the same key has already been added. Key: Animation Track (UnityEngine.Timeline.AnimationTrack)
System.Collections.Generic.Dictionary`2[TKey,TValue].TryInsert (TKey key, TValue value, System.Collections.Generic.InsertionBehavior behavior) (at <e40e5a8f982c4b618a930d29f9bd091c>:0)
System.Collections.Generic.Dictionary`2[TKey,TValue].Add (TKey key, TValue value) (at <e40e5a8f982c4b618a930d29f9bd091c>:0)
UnityEditor.Timeline.TimelineUtility.GetBindingPairsFromDirectors[T] (System.Collections.Generic.IEnumerable`1[T] directors) (at Library/PackageCache/com.unity.timeline@1.7.2/Editor/TimelineUtility.cs:286)
UnityEditor.Timeline.WindowState.OnStartPreview (UnityEngine.Playables.PlayableDirector director) (at Library/PackageCache/com.unity.timeline@1.7.2/Editor/State/WindowState.cs:1016)
UnityEditor.Timeline.WindowState.GatherProperties (UnityEngine.Playables.PlayableDirector director) (at Library/PackageCache/com.unity.timeline@1.7.2/Editor/State/WindowState.cs:993)
UnityEditor.Timeline.TimelineWindow.RebuildGraphIfNecessary (System.Boolean evaluate) (at Library/PackageCache/com.unity.timeline@1.7.2/Editor/Window/TimelineWindow.cs:468)
UnityEditor.Timeline.TimelineWindow.OnGUI () (at Library/PackageCache/com.unity.timeline@1.7.2/Editor/Window/TimelineWindow.cs:251)



1.Two Control track control two Cube
2.Two cubes use same timeline