Where do Warpers go when they teleport?
Solution 1:
It depends on why it teleports to. If the Warper is dealt enough damage to "kill" it, it will warp away (and despawn) instead of leaving a corpse.
Conversely, if the Warper is merely patrolling (has not noticed the player, or they are being actively ignored), it warps back to a spawn point (whereupon it will resume patrolling again).