Mulicam angles being changed back to 1 by Premeire for no reason

I am seeing instances of multicam clips in timelines where I've set it to say angle 2 and then I come back to it (possibly after a restart) and it's on 1 say. Actually it does seem to always change to camera 1.

Premiere is changing the angle without my intervention. I've seen this on multiple timelines

Pr beta 23.6.0.32
Large Production

Also, when I fix them - like just now I put a MC instance to angle 4, saved. On restarting Pr, it was back at 1, so it didn't stick. Same thing for just closing and re-opening the project without closing the whole production.

I've also tried reverting to non-beta 23.5 and it won't even playback some of my wav audio so that feels like a no-go, so I'm a bit stuck. On further analysis, every file says pending when I open the production in 23.5 and it seems to be wanting to make a new .ims file in C:\Users\[username]\AppData\Roaming\Adobe\Common\Media Cache Files for each file, which in my case would be a long wait on a big documentary like this.