Hi @taligentx,
Something I noticed recently. Watching channels with tags works great when I am on my local network but if I am on another network (LAN or mobile) they fail. If I disable the tags Plex transcodes as expected because of "unknown container" and it works fine on other networks. Maybe something to do with UPNP or WAN vs LAN IP address? I watched the console but did not see any errors other that this one...
get - invalid ratingKey value: 668831b0ccbce0ac1d54cb4549a739d6