Delay in TV Programs.

There is a 45 to 50 second delay viewing programs using my cable boxes. Instead of a program starting say at 8:00 PM, it starts at 8:00:50 PM. The delay also shows up using the auto resumed on recorded programs. This delay is not presenting when viewing programs using the Xfinity Stream app. I have restarted and refreshed my cable boxes, and the delay is still present. I understand why there might be a delay with live sports programs but not with the regular broadcasts.