Streaming of Live TV through Plex halted during adverts

Server Version#: 1.28.1.6104
Player Version#: All players

Live TV Source : Model HDHomeRun CONNECT DUO

This occurs when old movies and TV programmes, being streamed through Plex Server, are interrpupted with commercials. It appears that the change in video resolution is at the heart of the issue. Channel most frequently affected is 5 USA.

Problem has been going on for some time through verious earlier server releases.

I have tried changing playback quality settings but this make no difference
I have not configured the server to skip commercials

Advice leading to a resolution would be greatly appreciated

Yep, I live in the UK and have seen this plenty of times too. Like you I suspect a change in resolution and or streaming data quality requirement
I use Nvidia Shield, HD Homerun, Synology NAS all over a LAN