It has become unusable.

When executing the /imposter command, the transformed animal remains motionless in its changed form, while the transformed original body enters a state similar to ”vanish”.
In this state, surrounding voices cannot be heard, and the animal itself cannot be moved or controlled.

Is it all animal or just the jungle animals?

What I checked is bear

Ok . I checked jungle animal all wored as entended ill check rest now

all animals works as intended . check if you have plugins doing things in animals