Yorick Ultimate Bug?

So today, I was playing a game like any other. The enemy team had a Yorick and a Wukong. A fight broke out and Wukong dived headfirst into our team and got shredded. Wukong popped his ultimate while he died but the thing is, Yorick ult'd him so he was still "a live". While he was a ghost, he kept spinning and spinning without stopping. Im not sure if I was seeing things but that ghost Wukong was definitely spinning and that ultimate was lasting longer than it should have. I asked my teammates and they said that they also saw Wukong spinning longer than he should have. I'm still not sure but please look into it.