Sometimes getting a "... One moment please" Message when I turn on my TV and XG1v4 DVR

Typically 1 or 2 times per day, when I use the Xfinity DVR remote to turn on my TV and XG1v4 DVR I get a black screen. If I then press the center button, I get a "... One moment please" message on the screen and nothing else. Typically what I do next is type-in the channel number for the station I want to see (even if it is the same channel I was last tuned-to before I turned the TV/DVR off). That usually gets my desired channel up and running. This can happen with any channel, but I am often tuned to CNN (Channel 657) when I turn-off the TV/DVR, and when I turn them back on and if I happen to get the "... One moment please" message, I often find myself typing 657 to get CNN back up and viewing. This problem has been occurring for about 2 months. Any ideas as to what could be wrong?