Some video freeze and fast forward


I don’t know if anyone has encoutered this problem with their WD media player.  I have a WD TV Live model and the firmware is up to date.   some movies I played fast forward or freezed.  I have to press pause and play to continue watching the movies. otherwise the video would completely be frozen and I have to restart the unit.  Not all my movies encounter this issue.  As far as, I can tell there is nothing wrong with the file.  I use VOB format.  It’s a straight backup of the original DVD.