When using the spectrum app the picture will freeze and not move, changing the channel on the app( from 8 to 10 ) everything works great and changing back after 5min, 8 works fine for a while. If I change from 8 to 10 and them change back again the program will start about 1min before the freeze and then freeze at the same point as before. How can it do this? How does it record and play back? any advice would be much appreciated.