According to the wiki https://civilization.fandom.com/wiki/Vampire_(Civ6) :
"Vampires can be killed when they are on a Vampire Castle improvement. This is very similar to the situation mentioned above. Remember, in both of these situations, Vampires can only retreat once per turn, so a good tactic to use is to identify where the closest Vampire Castle is, set up an ambush there and kill them after they retreat."
I tried to set up a trap (picture), first attack with the Helicopter, then the Spec Ops, hopefully that vampire will die eventually.
But no, the vampire just teleport to another vampire castle.
Few turns later, I even tried to occupy the other vampire castle, that vampire teleported to Russia capital (where, at that time, there is another vampire healing).
If this is not a bug, I think the dev secretly changed the vampire mechanism, the wiki page should edit this.
"Vampires can be killed when they are on a Vampire Castle improvement. This is very similar to the situation mentioned above. Remember, in both of these situations, Vampires can only retreat once per turn, so a good tactic to use is to identify where the closest Vampire Castle is, set up an ambush there and kill them after they retreat."
I tried to set up a trap (picture), first attack with the Helicopter, then the Spec Ops, hopefully that vampire will die eventually.
But no, the vampire just teleport to another vampire castle.
Few turns later, I even tried to occupy the other vampire castle, that vampire teleported to Russia capital (where, at that time, there is another vampire healing).
If this is not a bug, I think the dev secretly changed the vampire mechanism, the wiki page should edit this.