Not a bug
Unity 2019.3 display issue
UMotion can be use.
The only problem is this UI display issue.
UMotion Version:
1.19p01
Unity Version:
2019.3.0a3
Customer support service by UserEcho
Hi Jackie,
thank you very much for your bug report.
This is a bug in the Unity alpha version you are using and is fixed in Unity 2019.3.0a5 and above:
https://forum.unity.com/threads/umotion-animation-editor.490618/page-7#post-4623547
Please let me know if you have any follow-up questions.
Best regards,
Peter