Apps causing X1 box to lock up

Happens everyday for last week.  Trying to open the WEATHER, HOROSCOPE or SPORTS app on the X1 receiver and the entire box freezes. Only way to get out of it is to press the blue power ring and power cycle it. Tried a full system restart (Unplug for 15 secs) and it still freezes on certain apps. Comcast Labs shows a "GOOD" signal level. Any ideas ?