Hi @latunda! This is actually working as intended and the effect should only work if the raptor is being ridden by an affected player. You could add this to Feedback & Requests if you’d like to see it in the future.
Actually animals used to slide before just fine and raptors too.
I remember in Frozen Lake, I was seated and raptors tried to approach me but because they were on ice they kept missing me. Bots and animals are super funny on ice because they can’t adjust their movement correctly.