Aatrox's unique interactions with Tryndamere are bugged

Played a game a couple nights ago as Aatrox top against a Tryndamere. Aatrox has a unique interaction with Trynd where he'll say a special line the first time he sees Tryndamere, but Aatrox continued to cycle through the two unique lines endlessly as long as Tryndamere was visible. I'm guessing this is probably not intended.