Idk if I’m just lucky, but I’ve been running Plex on Linux for years without any major issue. Occasionally I had to hit things with a chmod, but that stopped being an issue after I changed a setting in qbittorrent, and that isn’t really Plex’s fault.
Rarely, if it is transcoding something and I pause for a long time, I may have to stop it and play it again to get the transcoder running again. It is a very minor issue that I barely ever think about unless I’m traveling.