[Krypton] Duplicate (invisible) library entries

I’m having this weird problem for a while. It popped up on LibreELEC 7 (Kodi 16) a while ago, but I thought it was a skin problem. I’ve had a few of the Kodi 17 betas (and now the RC3 with LibreELEC 8 beta 1).

In the library overview, the number of episodes is doubled for a lot of series – and shows a lot of ‘unwatched’ ones. My default view only shows series with unwatched episodes. All series I have ‘finished’ have also been showing for a while. When I enter the folder for one of these series, it shows all episodes as watched.

Screenshot:

[Image: Kodi_RC3_series_duplicates.png]

E.g. Rome has 22 episodes total but is showing 44 (and half ‘unwatched’). Sense8 has 12, but shows 24 and half unwatched as well, … and so on.

It looks like there’s something botched in my library; however, multiple cleanups (through the Kodi interface) do not change anything. The files are not there, but Kodi seems to think they are, so I am at loss about how to tackle this. Any tips?

I don’t think this is a Linux-specific problem, but since LibreELEC’s Linux I put it here. Feel free to move if appropriate.