I constantly have issues with keep doors. Sometimes takes 3-5 seconds to use a door. Even worse, when trying to get into a keep that's being sieged, you'll use the door and then somehow use it again and end up back outside.
One example of this around the 18 second mark.
Unfortunately I don't have a recording of one instance where there was no combat and it ported me through the door twice about a dozen times trying to leave Alessia.