On the Android version that was just updated, was playing a game of Standard Ranked and discovered that it would not allow me to play cards or target things as normal.

When attempting to cast a Cut Down on a Llanowar Elf, it did not show up as a valid target. Then, when attempting to cast an Overlord of the Balemurk for its Impending cost, I could not select either option and then the card simply disappeared from the game. Something seems to be seriously bugged after this new update.