It has nothing to do with solo BSTs. It's a problem that I've seen occur on Jailer of Love a few times. If a SMN had an avatar out, and Love popped her pets, and then the SMN released their avatar before anyone took any action on Love's pets, the pets would automatically go after the SMN. The SMN did nothing to draw their attention, just the action of releasing their avatar was drawing hate. Love's hate was planted firmly on the tank, as were the pets, until the avatar was released.