FireTV stick disconnecting from Plex server during playback
Behavior recently started, seemed to be worked OK previously. Home network, Plex media server running on Windows 10 PC, Version 126.96.36.19929. One Comcast Router with WiFi, close proximity to home theater. During playback of movies or TV shows hosted on main PC, The Amazon FireTV stick will lose its connection to the Plex server. Happened about 1x ever 20 minutes during a movie last night. Only way to get it back was to restart the Amazon FireTV stick, then worked fine for about another 20 minutes - lost connection, etc.
IP Vanish is not running when I use Plex on the FireTV stick.
Where to start troubleshooting?