I have the exact same issue.
Also, see this: Absolute Series Scanner (for anime mainly)
The steps to properly reproduce this are to put a few episodes into a series folder without playlist subfolder, because again: a lot of uploaders in the real world don’t bother with putting all or even any videos in a playlist… It seems to trigger this better by using an older upload? E.g. you have 3 vids from 2019 and 3 from 2018, if I add a video from the beginning of 2018 it’ll cause this to happen sooner? Maybe it’s coincidence though, I haven’t tested a lot of channels and vids, because why add a lot only to be forced to do the Plex dance and lose all your play counts anyways?
I’m using latest Absolute Series Scanner, latest Youtube Agent. I suppose it’s a Scanner issue, because episode assignment is done by the scanner. But if you say post it in the Agent thread I’ll merrily do it, in the end the same guy sees the request anyways…
Logs:
Youtube Agent didn’t create one after refreshing metadata or after adding an episode…