I have had this issue the past few weeks. I have the contour 2 box that keeps recordings on the box, not the cloud. Recently when watching recordings, the screen freezes, and after a short while I am kicked out of the recording. Even worse, when watching recorded football, it freezes a while and then goes to live! This reveals the score of a recorded game I am watching!
Today, my main box and satellite box don’t work. Tried everything. Worked with cox assistance that just told me to do everything I already did. Have to replace, but they no longer support non-cloud boxes! I tried cloud based a few months ago and it was a HORRIBLE experience. Very slow with regular commands, but horrible on DVR playback.