Similar problem here. QIP7232 2 STB connected to the TV in question, not remotely operated.
Unit worked OK for a number of months, but then started loosing it's place when using the SKIP function. Problem became progressively worse. I also now see problems with FAST FORWARD. Some times it gets jumpy. Progress bar looses its place, and the program jumps back to the beginning in both cases.
After 40 years in the computer design business, my SWAG (sill wild-assed guess) is that it could be a hard-dribe fragmentation issue. Is ther a proceedure to "defrag" the drive.
Positive resolution of this problem will keep me from going back to Xfinity.
Sky