Hi @MewMew,
Im pretty sure this is the same issue that has been mentioned here: Converting to a lower quality fails with Hardware-Accelerated Streaming in Plex Web - #19 by nlundqu
See post #19 that is linked above as it mentions the same two plex clients failing when attempting to transcode to a lower quality.
I would recommend adding your logs and findings on that thread as this issue is still ongoing.
I do have one question @MewMew, your title of this post states “problems after moving plex server”, do you still have access to your old server to attempt the same scenario & check if the issue occurs on the old server?
