First battle in GAC after your update. Wampa vs Grievous droids (no B1, HK instead). I took out Magna, then buttons disappeared. I could selected everything else, autoing the battle didn't work eithe...
Ideas
I also just had the buttons disappear in a gac match with Gungans attacking GG. As mentioned above I could press to auto or basic attack, but nothing would happen. I’ll open a separate msg.