why are the NPC's not despawning after event failed?

Just tested on two GuardedCrate spawns , one easy and the other Elite, All guards disappeared at the same time the crate disappeared, you might have something conflicting with the plugin.

pookins

Just tested on two GuardedCrate spawns , one easy and the other Elite, All guards disappeared at the same time the crate disappeared, you might have something conflicting with the plugin.

Found the issue thank you :)

EarthsDefect

Found the issue thank you :)

That is great to hear could you change the status to "solved"  :)