Larian Studios Forums Divinity - Original Sin Divinity - Original Sin - General Why does my attack vary between 3 and 4 AP?

It seems to be a bug. I've had this problem occur post-launch with Madora. She had not moved for several turns, and the only debuff she had on her was "wet". And yet it cost her 5 AP to swing her weapon (instead of 4) from a stationary position for most of the battle.