Reporting a bug

Before I upload the blend.file to Blender's bug reports page, may I get someone to double check it for me to see if the error is on their end too, and it isn't a "me" issue.

https://www.dropbox.com/scl/fi/niul48dl8c1azqoq0vv9n/Bunny.blend?rlkey=mbhdypcl0ultyghyejw5wc11s&st=cgzdat3a&dl=0

I'm referring to this issue I had to other day - I've just opened the file to continue practicing and it is unfortunately still persisting.

To clarify, I can expand the bone collections tab in the armature data properties, but when I change to another properties tab (EG: render properties) and then revert back to the armature tab the collections has collapsed and I need to expand it again - it isn't a life changing problem, but it's a pain to need to do each time.

I opened the file in 4.2etc and it worked fine, so I suspect it's a 4.3 issue if anything.

Cheers!