remote DVR fast forward command - XFinity

This question is about "remote DVR fast forward command", with XFinity-Comcast television equipment. Recently, my DVR fast forward command for recorded programs has not been responding normally. If I FF through a series of commercials, the FF command just runs through to the end of the program, very rapidly. This happens at the 2X, 3X, and 4X speeds. I've rebooted the box, but still have the same issue. The box is probably 3 years old.

This topic covered remote DVR fast forward command, and XFinity - Comcast cable tv service.