diff --git a/docs/PARALLEL_INCOMPATIBLE_PLUGINS.md b/docs/PARALLEL_INCOMPATIBLE_PLUGINS.md
index 875eca7..5cdeb7e 100644
--- a/docs/PARALLEL_INCOMPATIBLE_PLUGINS.md
+++ b/docs/PARALLEL_INCOMPATIBLE_PLUGINS.md
@@ -132,4 +132,8 @@ If a player mounted on a Warden teleports to another world, the server crashes.
 
 This is caused by https://github.com/MyPetORG/MyPet/issues/1647 and can even cause issues in vanilla Paper. In vanilla Paper, instead of crashing the server, the player is teleported back to the Warden's location.
 
-Fork that removes the affecting code: https://github.com/SparklyPower/MyPet
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+Fork that removes the affecting code: https://github.com/SparklyPower/MyPet
+
+## Citizens
+
+If a NPC with a sleeping trait is teleported to another world, the server crashes because Citizens attempts to query the NPC's "bed" when ticking the entity, and because the entity is in a whole different world... things explode.
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