Same problem here. We have just started watching newsmax on roku so we were not sure if it was something we were doing wrong, but it is the only program (station) that stops in the middle of watching a program. It has happened multiple times to us in the past few days.
I have the same problem as @Suellen!Suddenly Newsmax live will just shut down. Then we need to go back to home and reopen the app. That usually gets it back. Very annoying though. Don’t like to watch on the Roku channel because of the long delays. I feel like I’m missing something.