FWIW I have experienced multiple corrupted badger repositories on multiple nodes (some more than once): a Windows 10 desktop (NTFS), a linux laptop (EXT4), and a linux server (ZFS). When this happens, the tools available at the time to attempt to repair the badger db (I don't know if that has changed) don't seem to currently handle all failure scenarios -- or don't always work for whatever reason; or at least I wasn't able able to get them to work.
Another issue I've experienced is that GC doesn't seem to reliably reclaim disk space when using badgerdb.
Can you describe more about your setup? I started noticing some undesirable memory utilization and performance issues around 500 GB. However, I also use this server for a bunch of other stuff so it didn't have free reign of all resources.