My apple TV works perfectly on all TV stations and Netflix except SBS on demand. Programme starts and stops continually - help

Apple Tv is connected to Main TV and works perfectly on all Channels and Movies and Netflix except SBS on demand. The programme selected on SBS starts and stops continually and you have to keep starting it from the remote.

I have held Menu and Home down tilll the box starts blinking and gone to systems and restart.

Problem is still happening