It doesn’t crash on every download completion but happens a lot most of the time when i’m downloading a magnet files. Files I download between 150MB - 800MB.
Happened on BC 1.33 so I updated it to 1.34 but the problem still there.
Look under Options → Advanced → and see if bittorrent.hash_check_on_finished is set to “TRUE”. If so, try setting it to “FALSE” and see if that solves the crashing problem.