When Tixati starts up, it checks all the Torrents.  This is fine.

However, if a Tixati backup job runs while those checks are running, all the checks freeze and do not restart after the backup is completed.

The only solution is to stop Tixati and relaunch it.  Which means it has to recheck absolutely every torrent.

If you have a lot of torrents, this can take some considerable time.

Tixati v2.83 64-bit Windows Build running on Windows 10