Assuming the pause button on the remote is working then I would guess the problem is some sort of corruption of the time shift buffer on the hard drive.It used to be fairly common the earlier Humax boxes but I don't think it is often reported on the more modern boxes.I’ve read and read about the time shift buffer problem causing live pause not to work, but I don’t have that. I can record, rewind and fast forward, but cannot pause.
The box has software 3.09.86
What you describe is not a remote for the HDR-1100S.I did consider the pause button being faulty on the remote control, but if I rewind/forward a live or recorded programme I can stop it at a certain point by pressing this (play/pause) button and the programme starts again from that point. That makes me think the button works OK?