The symptoms here are very similar to mine.
Plex running on synology
Update from Fritzbox 6590->6591 (docsis 3.0 → Docsis 3.1)
Metadata update takes very long. But mostly everything is loaded except for posters and cast pictures.
But the posters are selectable during editing, they are just not assigned correctly.
I have already tried pretty much everything (cache data deletion, plex dance, ports new etc.)
Everything can be read here:
Log attached.Plex Media Server Logs_2020-03-12_12-38-35.zip (6.0 MB)
