In CocosEditor, FBX Animation will be from slow to quick

[tangkaikk]

Cocos Creator version

3x

System information

CocosEditor

Issue description

1.click the scene and double-click the role prefab 2.click FBX to preview the idle2 animation, at the beginning ,it will be slow, 3 click the prefab node in the scene. 4 under assets and click FBX again, broadcast the idle2 animation, the animation speed become quick.

Relevant error log output

none

Steps to reproduce

1.click the scene and double-click the role prefab 2.click FBX to preview the idle2 animation, at the beginning ,it will be slow, 3 click the prefab node in the scene. 4 under assets and click FBX again, broadcast the idle2 animation, the animation speed become quick.

Minimal reproduction project

prefabAnimationSpeedTest.zip