Hearthpwn

I have witnessed this bug several times and its been here quite a while I had no idea what caused it to happen but recently I had a close aggro pally mirror game where I topdecked leeroy for lethal... so I played him pretty fast and I could not click on him to target my attack which obviously cost me the game... I tried restarting the game but didn't manage to reconnect to see if that would have fixed the issue, but as I said I had this bug happen to me before several times and it's been quite a while since it happened again (probably cuz I don't play aggro decks or charge minions too much) anyways i want to know if any of you guys went through this and why is blizz not fucking fixing it.

I've encountered it before not sure what the fix is though....