Do you have a bunch of other games or other recordings set during the time frame that the Golden Knights games comes on? If so, the Golden Knights games may be set for a lower priority and are not recording because of this. You can check the priority of your recordings by bringing up the scheduled recordings screen, go down once and then back up. Scroll over to series priority and everything you have set to record will be in order by importance. You may want to move the Golden Knights up to the top to see if that makes any difference.