Ay sorry I took so long to respond, but I managed to get back to that point and it happened again. It happen in the Basel boss fight where after I already beat it... and after it faded to black it sorta just... got stuck in that state. Then I exited out of the game and when I re-opened it, it wouldn't let me back in. I hope it's recoverable.
The corrupted save file:
https://drive.google.com/file/d/17FcGNxpOTeCt5-UYNFsshFr03gG84YeS/view?usp=shari...