Couldn't report the bug through the bot because the game wasn't saved :

I had a full board of 1/1's and a buffed 2/4 bilefin, opponent's board empty , bot attacks face with the 2/4 and it dies to vaporize .

Makes so that when a mage or hunter has a secret attacks with the weakest minions first if possible , and if lethal and opponent is mage and has a secret up if possible create lethal so that the mage gets as low as possible to play around ice block