Studio Activity Log shows edits that didn't happen

[medlans]

Expected Behavior

People who aren't managers shouldn't show in the activity log as editing a studio.

Actual Behavior

In the activity log of some studios, there will be a message that says "{username} made edits to the title, thumbnail, or description," even though the user in question didn't edit any of these nor toggle comments on

Steps to Reproduce

1. Go to one of these studios
2. Click on the "Activity" tab
3. In studios with the problem, it will say sth like "{username} made edits to the title, thumbnail, or description."

However, the user in question was never invited to the studio or at least didn't edit.

Here are some examples:

https://scratch.mit.edu/discuss/topic/867662/

https://scratch.mit.edu/discuss/post/8990165/ (user mentioned by the topic creator wasn't invited as a curator nor a manager in the first place according to the logs: https://scratch.mit.edu/discuss/post/8987779/ )

Screenshots

System Details

Currently trying to collect for others, but I've noticed it on other studios:

My browser / operating system: Windows 7, Chromium 146.x (chromium-for-windows-7-REWORK), No Flash versions detected

My browser / operating system: Windows 7, Chromium 147.0.7689.0 64-bit (chromium-for-windows-7-REWORK), No Flash versions detected

My browser / operating system: MacOS 11.3, Chrome 138.0.0.0, No Flash versions detected (not modified)

I've also tried without extensions

[medlans]

People have said that this allows you to replicate:

1. Make a studio
2. Add a project to the studio
3. Edit the title of the studio
4. change the description of the studio