Aram mark/dash aa bug?

Not sure if this is intended cause I don't remember having this problem before. When you finish dashing to the marked target your champ will auto attack the marked target. While its possible to not auto attack by using the stop command, it will not work with empowered attacks. Its not a big deal but this affects Twisted Fate significantly. Locking in a gold card then dashing to a minion to get in range to stun a champ was a fun strat. Now you have to make sure the guy you marked is the one you want to stun or wait till after you dash to activate pick a card. Hey maybe its counter play but its really awkward how this only affects TF negatively. He is not even a great aram champ. Reproducing is simple. Mark a target and try to attack someone other than your marked target immediately after dashing. You can't. Oh and i have auto attack disabled. My champ would do one attack then stop every time.