Modifying tile atlas texture will sometimes reset the selected source

[KoBeWi]

Godot version

d6d20d0

System information

W10

Issue description

Normally when you have tiles editor opened, updating the used texture will refresh the view, but keep the currently selected source. But sometimes it will enter a weird state where any change to the texture will reset the selected source to 0.

This happens seemingly randomly and will get fixed permanently (until editor restart) when you switch to TileSet tab and then modify the texture.

Steps to reproduce

1. Create a TileMap with multiple atlas sources
2. With TileMap tab open, modify its used texture externally
3. The editor will reset to the first source if you have another one selected
4. If it didn't happen, restart editor and try again

Minimal reproduction project

No response

[KoBeWi]

I didn't see it for some time; might've been related to one of the sorting bugs.

[KoBeWi]

Nevermind, it's happening again.