Roku live TV problem with new plex app

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Ever since the new ROKU Plex app arrived I am having the same issue on all my TV’s (4) equiped with Roku devices. The live tv will play but after a few minutes a small part will suddenly repeat followed by an error message. Message says “Check weak signal or antenna problem”

After clicking OK I go back to the guide and reselect the same channel and from there on it and other channels run without issue. As mentioned above this happens on all of my Roku devices. I have plenty of bandwidth and signal strength and have no problems streaming items in my Plex libraries or other Roku channels.

One TV to which I have a Roku attached is also a smart tv. When using that TV Wi-Fi and the plex app on it (old version) the above never happens. Seems to be a problem with the new app.