Choosing "start (skip intro)" after restarting after a loss causes all helper characters to turn invisible and causes Susie and her target to turn invisible for the rest of the fight after using Overheal. On Win11 with the recruit var, if that helps any.
Viewing post in CH7 Knight rematch (Normal+Recruit route) comments
ok so I know what causes it now
I may be stupid
when you die, it triggers a broadcast that causes a lot of things to stop / reset, one being the background, since it blacks out during attacks, and I wouldn't want it to start blacked out
for whatever reason, when the background resets on death, I had made it STOP REGULATING THE LAYER IT WAS ON, which allows other components to move behind it when specific actions are taken.
it... should be fixed in ~10 minutes