I see this has been asked before but the issues and/or solutions are different. Basically up until a couple of weeks ago my Shield was (mostly) playing just fine and PMS would rarely stop of its own accord.
Since then I've moved house, and replicated my setup in the new place. From a technical point of view I didn't change anything. So NAS -> Shield -> Anthem 520 -> TV, all ethernet. The only thing that's slightly different is I now have a Sky Q hub instead of a standard Sky router for DHCP.
Initially it seemed OK, then the PMS kept stopping. Every half hour/hour. I uninstalled PMS updates, same thing. Reinstalled, same thing. Removed my USB stick, same thing. Reset the Shield and reinstalled with default PMS (this was slightly better), updated then back to same thing.
Right now it's every time I start Plex it can't find the server and I have to manually start it.
Thoughts and prayers?