[Timeline] Preview stop working when using multiple animation tracks except for the last one

Steps to repro:
1. Open attached project
2. Open "Timeline" Scene
3. Window > Sequencing > Timeline
4. Move play head or click play in the timeline window

Actual Result:
1. The preview for first animation clip is not playing when multiple animation tracks are used
2. Animation plays while playing game
3. If multiple animation tracks are used preview works only for the last animation track
4. Preview works for overridden animation tracks

Expected Result:
1. The preview should work for multiple animation tracks

Environment:
Windows and Mac

Occurring with:
2018.3.0a11, 2018.3.0a6

Working with:
2018.3.0a5, 2018.3.0a1, 2018.2.2f1