YouTube TV App Issue

While using the YouTube TV app, I'm receiving a error message ("Sorry this is not working..... APPS-04154) that flashes on the screen leaving me with a blank screen or it takes back to home screen. The only way to resume watching YouTube TV is for me is to restart the Flex device.  I've contacted Xfinity support. They will have me restart the Flex, maybe ask me to clear the cache and tell me diagnostics look good against my device. I'm not having this same issue with any other streaming device just Flex. I need help please as I do not think it is normal for this to happen and I should not restarting the Flex device numerous time daily.