Bot Mistake(s)

[Vallencia]

I was using the bot to play arena and watched it, the enemy had 12 health, my field had a total of 9 damage attack of minions. It was my turn and the enemy has no taunt or traps, but minions. I draw a spell card that has the effect: Draw a card and deal the damage equal to the amount of mana of the card(You have to select the target before the card is drawn) I just needed it to be at least a 3 mana card, but the bot selects an enemy monster to target instead of the face/hero and the card drawn was a 5 mana card and that lost me the game.