UI locks up on objective screen

Dobby
Dobby Posts: 161 Tile Toppler
After a battle, when you reach the objective screen, the UI can lock up sometimes. The Battlelog button still works, but no other buttons: Vault, Restart, Continue, Gain XP, Buy Crystals.

I've had this happen on multiple occasions. I think it's caused by tapping the screen too quickly after you have successfully mastered a card.