Changes to Timeline in prefab editor is not saved

Steps to reproduce:

1) Create a prefab
2) Add a Timeline animation to a game object inside the prefab
3) Make a change to e.g. the fixed duration of the animation while in prefab mode
4) Try saving the prefab and/or the project
5) Notice that no changes are written to the .playable file

Sometimes after waiting a while the .playable file is correctly updated. I suspect this has to do with how before Timeline changes where always made while in a scene, and when pressing "Apply" on the prefab the changes were picked up correctly.

It is possible many other similar issues exist with other component while in the prefab editor.

This behaviour was seen in 2018.3.0f1 on Mac.

 

It looks like you're trying to file a bug report.

Please use the bug reporter for that - then your report will be in our system and not get lost.

Thanks!

 

the OP was maybe not sure whether it's a bug or a feature.