App works for about 10 minutes..plus recordings show but can't be played

2 Roku TVs that worked for an extended period on the streaming app, but now I have to reset the wifi to get the app to work at all, but then after 10 minutes or so, it goes right back to buffering.  I get the channel guide and select watch, but just 3 dots racing across the screen.  Same for recorded shows, I see my recordings but none of them will play.