With the latest update, the ONLY way to filter is to use a menu on the far left of the Channel Guide. You can use it to choose Favorites, but when you select a Favorite, then watch it, then go back to the Guide, it defaults back to All Channels. It makes choosing and watching your Favorites virtually impossible. Please actually have someone try it. I'm sure you have a UX team somewhere.
It used to work just fine with the old * to select a Filter, but not at all with the "easier than ever" Channel Guide.