errors in console / failed to call hook / timer fail

Hey Zeode! 

I'm getting these errors in console.  Plugin seems to be working, regardless of the errors its throwing to the console -- but, causes a lot of consolespam.   This was a heavynpc grenade toss - standard config (i've made no changes yet).

(02:27:56) | Failed to call internal hook 'OnEntitySpawned' on plugin 'NPCGrenades v1.2.7' [2949838417] (Object reference not set to an instance of an object)
   at void Oxide.Plugins.NPCGrenades.OnEntitySpawned(DroppedItemContainer bag) in C:/servers/green/carbon/plugins/NPCGrenades.cs:line 542
   at object Oxide.Plugins.NPCGrenades.InternalCallHook(uint hook, object[] args) in NPCGrenades.cs/Internal:line 273

(02:28:50) | Failed to call internal hook 'OnEntitySpawned' on plugin 'NPCGrenades v1.2.7' [2949838417] (Object reference not set to an instance of an object)
   at void Oxide.Plugins.NPCGrenades.OnEntitySpawned(DroppedItemContainer bag) in C:/servers/green/carbon/plugins/NPCGrenades.cs:line 542
   at object Oxide.Plugins.NPCGrenades.InternalCallHook(uint hook, object[] args) in NPCGrenades.cs/Internal:line 273
   
(02:29:56) | Failed to call internal hook 'OnEntitySpawned' on plugin 'NPCGrenades v1.2.7' [2949838417] (Object reference not set to an instance of an object)
   at void Oxide.Plugins.NPCGrenades.OnEntitySpawned(DroppedItemContainer bag) in C:/servers/green/carbon/plugins/NPCGrenades.cs:line 542
   at object Oxide.Plugins.NPCGrenades.InternalCallHook(uint hook, object[] args) in NPCGrenades.cs/Internal:line 273
   
(02:31:09) | Timer of 0.2s has failed in 'NPC Grenades v1.2.7 by ZEODE' [callback] (Value cannot be null.
Parameter name: key)
   at int System.Collections.Generic.Dictionary<string, Oxide.Plugins.NPCGrenades+NPCPlayerData>.FindEntry(string key)
   at bool System.Collections.Generic.Dictionary<string, Oxide.Plugins.NPCGrenades+NPCPlayerData>.ContainsKey(string key)
   at void Oxide.Plugins.NPCGrenades.GiveGrenadeNpcKit(NPCPlayer npc, Item npcNade) in C:/servers/green/carbon/plugins/NPCGrenades.cs:line 1241
   at void Oxide.Plugins.NPCGrenades.SpawnScientist(BasePlayer player, Item npcNade, Vector3 position, NPCPlayerData settings)+() => { } in C:/servers/green/carbon/plugins/NPCGrenades.cs:line 746
   at Timer Oxide.Plugins.Timers.In(float time, Action action)+() => { } in D:/a/Carbon/Carbon/Carbon.Core/Carbon.Components/Carbon.Common/src/Oxide/Libraries/Timer.cs:line 50

I will look into this once the Bradley Drops re-write update is out and I have my PC back online after completing a house move.