Since @korjavin2 and @iluminae have repeatedly seen the issue, it might be useful to add more verbose logging in badger compactions to figure out why/when was this particular table was deleted.
Also, if this happens again, please save the logs of Alpha that’s acting weird and collect the output of badger info --dir /path/to/pdir (note: You might need to set the readonly=false in info command if alpha didn’t shut down properly).