Haruma-K
Last frame is no work in timeline
Last frame and second last frame is same value In play. So I gress last frame is Last frame is no work.
Just open one timeline，and set to last frame. For example, Canvas Group Aniamtion Clip the star value 0 and end value 1, end of animation, the vaue will be 0.99, it not 1. In PlayableBehaviour, the clip last frame intputWeight is 0, maybe it the reason i think.
Because in the function AnimationBehavior.EvaluateCurve(), the range of return values for Mathf.Repeat(progress, 1.0f) is [0,1) and will never be equal to 1.
I apologize for the late response. Regarding the issue where the last frame of the Timeline clip is not evaluated, this is due to the specifications of Unity.
https://forum.unity.com/threads/animation-events-on-last-frame-arent-fired-in-timeline-when-its-the-last-frame-of-the-timeline.791258/
The EvaluateCurve issue pointed out by @Langdex is a separate bug and I will fix it.
Regarding the issue where the last frame of the Timeline clip is not evaluated, this is due to the specifications of Unity.
This can also be reproduced with the Unity official asset "Default Playables."
Because in the function AnimationBehavior.EvaluateCurve(), the range of return values for Mathf.Repeat(progress, 1.0f) is [0,1) and will never be equal to 1.
fixed: https://github.com/Haruma-K/UnityUIPlayables/releases/tag/0.1.3