When the banishment spell ends on a creature, it "reappears in the space it left".
How do the rules handle the reference point to this space?
I'm well aware I can just choose how to resolve this as DM. I'm just looking for what the rules say.
For example, if the creature is banished from atop a galloping horse, after a minute the horse will have travelled a long way. Is the return point on top of the horse? Or is it where the horse was when the banishment spell was originally cast?
Same thing with being banished from a moving ship. Does the creature return on the ship's surface? Or above the water where the ship was when the spell was cast?