I was trying to drag an item from my stash into my inventory from outside the shop, the icon stuck to my cursor and icon after icon proceeded to blanket the screen to where i could not see anything. I restarted the game and it didn't fix it and then i restarted my PC and it still didn't work. So i abandoned the game and then restarted, everything was fixed. I am now in low priority for matchmaking because of the abandonment issues and it just stanks!