Restart of Plex is what fixes it for me. I even dropped back a version from the latest (Plex Pass), and it still does it. I just logout of the user (windows server 2019), and back in to have Plex reload, and then it’ll work fine for a few hours, maybe more, maybe less. PMS has also started getting hung up, and then eventually crash. I did a full clean OS reload (on new SSD) from Windows 10 Ent to the latest Windows Server 2019, and moved over my Plex appdata folder. That’s when I installed the previous public release (1291), and things have been running a bit better. I uploaded my logs to a post here in the forums before I did the clean load, etc (I’ve been meaning to put server OS on it anyways), but have yet to get a response.
Would be nice if I didn’t have to reboot the Plex server app to keep live TV going. 
