Unknownreported this bug
MD version 1.1.1 Snapshot Paper 1.19.2 - 280
To recreate this bug...
Create an NPC function with any Citizen NPC except not 0 and save the dungeon
Enter in play mode and while standing by the NPC use the citizens /npc select command
The NPC will look like the correct NPC, but the citizens command will always return NPC 0
Why this is an issue... I'm sure it's causing various other issues, but for me, it causes my quest conversation to always return the wrong quest dialogue.