TCL 55 Youtube and Other Channels streaming timeouts

I have a good connection  (76 Mbps download).  However,   my Roku connections to Youtube, and Rumble among others keep timing out like I am on a modem.   I have the latest software for the TV.   

Getting really frustrating.   Also, I have noticed that when I'm watching Prime or Netflix, the TV will suddenly reset back to the home screen.   

Any ideas?