OMG...I didn't realize that it was taking my gold or hearts every time I try to join or start a group. I usually have to hit the button 3 or 4 times before it will create the a group goal or let me join someone else's group goal.
I have the same question. I have Auto Chef & at 100% in Food, Decor & Equipment. I also have 5 stars in every episode. Just trying to figure out why I can't score well in duels in these venues.