DVR playback freezes and then ends without able to watch the recorded show

The DVR playback on TV has issues. I have followed all troubleshooting suggestions - like resetting the Set top Box, but continue to have issues when playing back a recording from DVR. I am able to start the playback but it will freeze and then end and end up having to fast forward to get past the spot where the freezing started. Also have issue with Live playback. When watching from xfinity stream, do not have the same issues.