In the perception of a regular witch, spatial teleportation is nothing but an instantaneous event; their dull senses hardly register any additional sensation. Isn't it just as normal as naturally stepping forward to advance a little? There's nothing strange about that.
However, for witches with space-time talents like Dorothy, their too sensitive perception and special physique allow them to sense much more during spatial teleportation.
But this isn't entirely a good thing, because Dorothy's pitifully weak strength doesn't allow her to decide what she wants to receive and what she doesn't, forcing her to passively take it all in.