NPC Rejoin Disappearance

[ItchyDitchy]

Describe the bug
Create an NPC -> Rejoin -> It disappears (I also execute NPC#show(Player player) on player join)

NPCLib usage option
2

NPCLib JAR name
npclib-plugin-2.12.1-SNAPSHOT.jar

Server version
Paper version git-Paper-794 (MC: 1.16.5) (Implementing API version 1.16.5-R0.1-SNAPSHOT)

To Reproduce
On Join:

npc.show(event.getPlayer().asPlayer());

For Creation:

NPC npc = ItchyDitchyPlugin.getNPCLibrary().createNPC();
npc.setSkin(skin);
npc.setLocation(location);
npc.setText(new ArrayList<String>(Arrays.asList(robotName)));
npc.setItem(NPCSlot.HELMET, helmet);
npc.setItem(NPCSlot.CHESTPLATE, chestplate);
npc.setItem(NPCSlot.LEGGINGS, leggings);
npc.setItem(NPCSlot.BOOTS, boots);

Create NPC -> Leave -> Join -> It does not show anymore.

Expected behavior
The NPC shows.

Screenshots
n/a

Additional context
n/a