I’ve just had the exact same problem. So much time and work lost because of a stupid crash. I can’t believe UE5 can corrupt an entire Level like this and reading so many comment, it seems like there is no solution.
I need to learn version control because UE5 is so unstable (and I have a high end PC - 13900k 128gb DDR5 6200 Ram, 3090FE, 12tb NVME etc etc) that I can’t lose this much time and work.