EDIT: Found the issue. I had Season 2 folder with NC (No Credit Openings and Endings) folder in it, and it had same amount of openings and endings as Season 1 episodes. So Plex for some reason was correctly playing Season 1 episodes, but showed those NCs from Season 2 in episode paths. Removed...
App crashes only on this anime and only on Plex, I have no idea what this happens. It happens both in auto sccrobble and if you have Squid Girl playing on Plex, open Hachidori and scrobble manually.
Tested in by playing through mpv and it scrobbled it no problem.
Other anime also seem to...