- I click on the prefab and click “Open Prefab”
- I make an edit (for a scrollbar I change the scroll Direction)
- I click out of the editor
- I repeat step 1 again, and the edit I made in step 2 is not present! It’s reverted.
I didn’t do anything else. What is wrong with Unity?
Hello!
Fo some changes, you must “Update” your prefabs in scene. I can’t say what kind of changes are automatic and what kind are not… but i had to refresh it sometimes

In inspector of the scene object click on Revert so it becomes identical to the prefab.
Bye!
Ok, I think the problem was that the things I was trying to change in the prefab actually was updated/changed by its script at runtime, so changing the prefab did nothing. I have to actually change it in my code to override their code.