Streaming on Ultra 4660R freezes
I have a 2017 Ultra 4660R connected to a 2016 Samsung 4K/HD series 8 with a Smart Hub. The audio and video has recently started to freezes and then will reboot back to the Roku home menu. This happens regardless of which channel I may be viewing, DirecTV, Prime Video, Disney +, or PBS. I can view Prime Video and Disney + on the Samsung Smart Hub without any problems with the freezing. DirecTV and PBS are not compatible with the 2016 Samsung and must be viewed with a streaming devise. How do I stop the freezing on my ROKU?
UPDATE: I posted this request for help or suggestions on how the correct a problem last week. To date there has been 100 views, but there have not been any solutions posted. Now the freezing is occurring while viewing a recorded DirecTV program, even freeze while the recording is on hold. After the freeze it reboots back to the Roku Home page, but with any app. I unplug the power for 20 sec and re-plug. I now believe the problem is my Roku Ultra. Any thoughts?