That's super weird behavior. The suggestions I had brainstorming were already answered by you in the video.
The only thing I can possibly think of it this:
(https://twitter.com/3d4xl/status/1625339649584398339)
Looks like your cameras are not being detected by windows so maybe that is somehow making the UI glitch out. It's very weird, because it does like multiple clicks in your video, which would make me think either a mouse or UI issue. but I really don't know. Could also try switching mouse USB port. or trying another mouse altogether to see if you get different results. Sorry again for the late response, I've been a bit busy lately.
btw, you might be able to restore the old save data, if you go to the gear menu and scroll down to open save data, click that button and in that folder might be a save data file backup from before deleting stuff (it will be labeled as such). if you open that and the regular save data file in a text editor, you can copy the backup data to the regular data file.