NBA League Pass/NHL Center Ice games freezing

Has anyone had any problems with games freezing?  The last few weeks games just suddenly freeze and will not unfreeze unless I change the channel.  If I hit channel up or down, then go back to the game it's fine, but it happens on every game I watch for more than 10 minutes or so.  

I'm not sure if I need a new box (or maybe gateway) or if it's a problem with the channels.  Every year Center Ice and League Pass have some sort of transmission issue and I'm not having this problem on any other channel (e.g., games on ESPN are fine), so I'm hoping it's an Xfinity issue and not my box.