Xfinity streaming keeps cutting out every hour on the hour

We have two TV's. Both have ability to watch Xfinity streaming. They cut out for a few seconds every hour on the hour. Also if I change the channel it buffers with --- for several seconds and then says to retry. I retry but nothing. I always have to turn off the tv and start over. This has been going on for months now. Nothing is wrong with my internet. That all works fine. Our tv's work for all other apps, etc with ZERO issues. 

So what is going on? Sick of paying for something that is not working correctly. I have to time changing my channel so that I have a few minutes for the TV to reboot. Also always miss the end of a show or news due to the cut out on the hour, every hour.

Please advise!