"Discard Card" not working
When an opponent played a card requiring that I discard a card, I was unable to choose a card to be discarded.
Steps to recreate
North 100% sure. Player played a card that says "opponent discards a card if you control a zombie", (I forget what card) and all my card light up blue, with an instruction reading "choose a card to discard", however, no matter what I tap, nothing I'd selected. I exited the game and returned to a random card being auto discarded.Platform: Android Phone
Results: Can't select a card to discard
Expectation: when I tap a card, it should highlight it red and allow me to press the "discard" button to confirm my choice.

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Johnny Wylde#45529 commented
2 games in and I'm already about to rage quit. Both games I played card or ability requiring me to discard a card I can't remember what the cards were, but I believe one was an activated ability and the other was a sorcery (maybe an instant).
It would let me highlight the card I wanted to discard, but the confirmation button would not function (I needed to tap in the area below my hand to make my hand small enough to reveal it)
This cost me one game and would have cost me the other if my opponent didn't quit on frustration waiting for me.