Is your feature request related to a problem? Please describe.
NPC doesn't disappear when player goes out of the range of the spawner making the spawner its self pointless and useless.

Describe the solution you'd like
If you add an option in the spawner to allow the npc to despawn once the player leaves the range of the spawner this would work amazing!

Also NPC's can be killed by guns in the create guns mod would be awesome if this could be countered.

Thanks for reading and considering if you have :)

Thanks for the feedback. I will add a despawn option for the NPC spawner.

The other issue is already reported under #87 .
Could you please confirm if the player which kills the NPC had OP permission?

The people who shot the NPC's did not have OP

Thanks for the feedback. This should be fixed in the latest version, which is still in manually review by the CurseForge team.