The problem happens on some channel but not all. The server run on Windows 10 and I try to do this using the web app via Chrome on the same Windows 10.
I have attached my log. I tried the actions many times between 10 am and 11 am on east cost time on 09/13/2019, like with channel 2.1.
When it comes to live tv I would highly recommend one of the Plex apps, either Plex for Windows or Plex Media Player. The former is newer / simpler, the latter is older but has a lot more bells and whistles.
It’s hard for me to read the log provided but I’m pretty sure the error occur on the server, and some channel work and some channel didn’t using the same client. The channel that doesn’t work doesn’t even start, I mean the browser doesn’t seem to have time to crash on anything since it receive nothing.
Web browsers generally are not recommended for Plex Live TV. Using a Plex app would at least help determine if the issue with the browser or the server.
Maybe someone else will come along and be able to help.