I got a bug that looks like this by opening up the graveyard and viewing it after hitting end turn and while waiting for my opponent to hit end turn. Once the turn really ended, the game tried to show me a card that was being played at the same time as I had a card from the graveyard zoomed in and the game froze and looked just like this.
My best guess is that this bug occurs sometimes when the game is trying to display two zoomed in cards at the same time.
Thats what I think too, the game just freezes when trying to display two cards at the same time.
Imo the graveyard popup shouldnt be in the center of the screen. But it into the bottomright corner and make the thumbnails as big as like 1/2 of what it is now.
That way the played cards and the viewed cards from the GY dont cross eachother.
There is also this bug when you view your GY and click your deck on the background, it pops up a card which is hard to remove from your screen. Buttonbashing 'Esc' might help sometimes. Short term solution though.