Last game i have had an extremely huge issue with playing Mirage on mobile client of HS. I played and it bugged in the middle of the whole screen and on some turns i couldnt play right most cards and in the End game, i couldnt play the Mirage, until i played the card i drawed that turn. It was extremely frustrating and of course i Lost that ranked match, because i couldnt even play the cards i wanted…
This happens to me as well every time I play Mirage. The only temporary fix is to close Hearthstone and reopen, but it will bug out again the next time I play Mirage.