TV guide went insane about 2 months ago - picks its own favorites, won't stay on HD, goes to "trending" by itself.

Around 2 months ago, the TV guide behavior suddenly changed.  It picked dozens of favorite channels all by itself.  It started insisting on going to "trending" view no matter how many times you changed it, and no matter what channel I'm on when I bring up the guide, it goes to 58.  There's no way to remove all favorites, so I removed them one at a time, taking hours, and put back only the HD channels I wanted in favorites.  When I was done I found it had reselected dozens more channels as favorites that I didn't pick.  Is it the box, or the service?  I am moments away from calling DirecTV or Sling.