vampire horse behaviour

so 2 problems. first one:i killed a raider horse inside my castle whenever i respawn or i teleport inside since the horse was never summoned again it still shows its dying animation again and again after tp or respawn. second. if u destroy a castle heart the items in the chests drop as a container if u park ur horse near one and if u dont take the container u cant hop on the horse again by using f (it says prees f to mount the horse but if u do it shows the mounting animation but at the last second opens the container not allowing u to mount the horse