NullReferenceException at HTNPlayer.OnKilled

Been getting this error quite a bit lately.  Only thing I can think of that uses HTNPlayer stuff is BotSpawn.  Anyway, error and plugin list below.  Thanks!

NullReferenceException: Object reference not set to an instance of an object
HTNPlayer.OnKilled (HitInfo info) (at <d59ae112ba9e47118fc088f2d8b8c39e>:0)
BaseCombatEntity.Die (HitInfo info) (at <d59ae112ba9e47118fc088f2d8b8c39e>:0)
BasePlayer.Die (HitInfo info) (at <d59ae112ba9e47118fc088f2d8b8c39e>:0)
BasePlayer.OnInvalidPosition () (at <d59ae112ba9e47118fc088f2d8b8c39e>:0)
BaseEntity.TransformChanged () (at <d59ae112ba9e47118fc088f2d8b8c39e>:0)
BaseEntity.NetworkPositionTick () (at <d59ae112ba9e47118fc088f2d8b8c39e>:0)
InvokeHandler.DoTick () (at <40091d253f174b8a91f1400171006dc1>:0)
InvokeHandler.LateUpdate () (at <40091d253f174b8a91f1400171006dc1>:0)
Invalid Position: scientist_corpse[4905049] (4000.4, 28.3, 2749.3) (destroying)
Invalid Position: item_drop_backpack[4905057] (4000.4, 28.2, 2749.3) (destroying)
Listing 14 plugins:
  01 "AFK" (1.1.5) by Wulf/lukespragg (0.01s) - AFK.cs
  02 "Auto Fuel" (1.1.1) by redBDGR (12.20s) - AutoFuel.cs
  03 "BotSpawn" (1.9.0) by Steenamaroo (124.85s) - BotSpawn.cs
  04 "Furnace Splitter" (2.1.7) by Skipcast (9.09s) - FurnaceSplitter.cs
  05 "Gathering Manager" (2.2.7) by Mughisi (0.23s) - GatherManager.cs
  06 "InfoPanel" (0.9.9) by Ghosst / Nogrod (6.67s) - InfoPanel.cs
  07 "Kits" (3.2.93) by Reneb (0.25s) - Kits.cs
  08 "Night Lantern" (2.0.97) by k1lly0u (2.57s) - NightLantern.cs
  09 "No Give Notices" (0.2.0) by Wulf/lukespragg (0.00s) - NoGiveNotices.cs
  10 "PlayerRanks" (1.4.6) by Steenamaroo (5.08s) - PlayerRanks.cs
  11 "RainOfFire" (0.2.52) by emu / k1lly0u (0.95s) - RainOfFire.cs
  12 "RemoverTool" (4.2.10) by Reneb/Fuji (0.18s) - RemoverTool.cs
  13 "Sign Artist" (1.1.3) by Mughisi (0.00s) - SignArtist.cs
The scientist has died out of liveable map (see 4000.4 coordinates). 100% on CH47 or CargoShip. If it happens on their map-leaving then it's ok. If it happens when spawning then it's a bug. I can help you with it. PM or Ultra#0868
Thanks Ultra!  Will keep that in mind.
BotSpawn doesn't use HTNPlayers.
Hope that helps narrow your search. :)
Thanks for the tip Steenamaroo!