Marking episodes as watched in series guide not syncing to trakt

Honestly I have only just noticed this but it must have been broken for a while because nothing for at least this year has synced up. I have tried logging out of trakt and back in again, but nothing. The other way seems to be working fine as I scrobble from plex, but anything I am manually marking in the app is not going up to trakt. Any ideas?

v67.0.3 Database v50

Discussed and solved at No update to "Verlauf" and sync to Trakt (since Jan 4th) - #15 by uwe

Closing this.