[BUG][GAMEPLAY] Yorick Ult Bug Found

Hello, Last night I was playing Yorick top into teemo. I ulted under my tower and I think the maiden of the mis got stuck? she sat under my tower for the rest of the game and did not despawn, but she did take damage and agree from the other teams caster minions. I did not get to see if it would resolve after she died because the enemy team wasn't able to take tower as they surrendered at 20. I could not recast the ult for the rest of the game while she was alive. Just wanted to let you know about it. Thanks!