Packmasters grab you from quite a distance away, and then you sort of lag out and teleport to their location. The distance they’ve been doing it and then the teleport is quite noticeable.
It’s similar to how it looks when you get gripped during a mobility Ult, but it’s usually during a dodge.
Only been experiencing it a lot recently. Noticing it outside of HM Ult is why it’s strange for me. So far I’ve only had one other person tell me that they experienced it too.