Kallista ult cancels Poppy's ult/Zed's Ult/etc

Whether said ults were cast on her or her partner, they disappear when she activates the initial part. As I was Poppy in this game, her ult is the only one I can personally vouch for.

In addition, the ult particle turned blue for my client for the rest of the game, making it rather difficult to tell when it had actually been cast.