There was a big change regarding UIDs in Godot 4.4.

You should have seen a warning popup about this when you first updated your project to 4.4. You would have been given the option to convert all files to the new UID format.

As far as I understand, this should have been done by one developer as the only change. An “upgrade to Godot 4.4” commit if you will. Then all other devs should have pulled that, then continued work.

Ideally this would be done on a branch to test the effect on the project. Engine updates should never be taken lightly during a project. This applies to any game engine.

I thought the whole point of the new UID feature is 4.4 was to help with git workflows?

git clean does. Turns out VSCode did a clean with that GUI option at that time, not sure of current behaviour.