100% confirmed, I just downloaded the new update on IOS because of your post. I looked at my pokemon. My 2592 CP blissy was favorited and had the symbol next to it showing it was in a gym. I then clicked on my Blissy and when I did it showed me the new remote feature Gohub published today. When I pressed cancel and returned to view my top CP pokemon my Blissy was no longer favorited.
In the name of science I clicked on my blissy and pressed transfer to see what would happen:
looks like it's a glitch where a Pokemon defending a gym overwrites a poekmons favorite status. At any rate it cannot be transferred while defending a gym.
And yes, remote feeding does not work for me either. My Blissy, currently defending a gym, and no longer a favorite is not receptive to my berry feeding. It's my only gym I'm able to see on my overworld map but I still receive a network error when I try to feed my Blissy.