To reproduce:
1. Open users attached project "TimelineFinalFrame.zip"
2. Open "SampleScene.unity" scene
3. Select DirectorTimeline timeline object in Project folder
4. Observe in the Timeline window as bot timeline animation and regular animation is ending on a 16 frame
5. Enter Play mode
6. Observe in the Console last Debug.Log Got Final Alpha 0

Expected result: after the animation ended the animation stays on the last frame
Actual result: if animations last keyframe and timelines animation is on the same frame and end on an even number then after the animation is ended timeline animation resets to the first frame

Reproduced on:
2019.1.0a1 2019.1.4f1 2019.2.0b4 2019.3.0a4

Doesn't reproduce:
2018.4.1f1

Notes:
- This happens whenever both animations end on an even number of animation frames (16,18,20...)
- If animation keyframe is longer than timeline animation, then the issue also reproduces