Is anyone else experiencing a weird lag problem with Contour TV mini-boxes?

I have an intermittent problem.  Occasionally, while watching something, the program will stall for several seconds.  Then when it restarts, it will repeat the last few seconds from before the signal stalled.  Then when it gets up to where it stalled before. It stalls again.  This cycle repeats over and over again. Like an old-time record skipping when it comes upon a scratch. 

The only work-around I've found is to switch channels and switch back again.  This removes the accumulated playback recording from the original channel.  

Peggie