[2019] Sparky can't handle Kasmina?

Hi there friends, just curious about some Sparky behavior. Was testing a Temur Walkers list against Sparky just to get an idea on what to do, and on one of her turns Sparky decided it'd be fun to just sit there and spam emotes at me. Forever. I let it run for a looong time just to make sure, but she was completely locked up.

Based on what I know about the white deck she plays, I'm assuming she was trying to play Pacifism on one of my creatures, but couldn't understand that it now cost 4 since I had a Kasmina in play. Any insight on this situation? I'll attach a screenshot for clarity. Thanks in advance!

Here's the screenshot.