After playing dopplegangster then evolve sometimes the minion on the right can not be interacted with at all. You have to reboot the game and then it fixes itself. This has happened to me multiple times in the last couple of days. I’m playing on mobile. iOS.
Was it a rush/charge minion? In that case, it helps when you wait a moment before attacking the hero. That bug has been around a long time.
https://github.com/HearthSim/hs-bugs/issues/1173