I cast Consider during my opponents' end step, and my deck appeared in the middle of the screen but didn't show me the top card. I couldn't drag the face-down card to my graveyard or do anything at all except "submit", after which I didn't draw a card and couldn't take any actions at all except emote a "shrug" to my opponent. Even the gear icon in the upper right corner was missing, so I had to close out the game from the taskbar.