CTD From Critter Flux-o-Matic

Working on an unrelated project when the ( off-screen ) Critter Flux-O-Matic caused a Crash-to-Desktop with a null-pointer.

Exception in: (GravitasCreatureManipulator).GravitasCreatureManipulator.root.operational.working.pre. 
System.NullReferenceException: Object reference not set to an instance of an object
  at GameStateMachine`4+State+<>c__DisplayClass50_0[StateMachineType,StateMachineInstanceType,MasterType,DefType].<ToggleTag>b__1 (StateMachineInstanceType smi) [0x0000c] in <8543f453fe4a4a6296c5be748aa9bf29>:0 
  at StateMachine`4+GenericInstance[StateMachineType,StateMachineInstanceType,MasterType,DefType].ExecuteActions (StateMachine`4+State[StateMachineType,StateMachineInstanceType,MasterType,DefType] state, System.Collections.Generic.List`1[T] actions) [0x00048] in <8543f453fe4a4a6296c5be748aa9bf29>:0 

  at UnityEngine.Logger.Log (UnityEngine.LogType logType, System.Object message, UnityEngine.Object context) [0x00000] in <c39a522eee05469b8171a6cfeb646c59>:0 
  at UnityEngine.Debug.LogError (System.Object message, UnityEngine.Object context) [0x00000] in <c39a522eee05469b8171a6cfeb646c59>:0 
  at Debug.LogError (System.Object obj, UnityEngine.Object context) [0x00000] in <eeaae6bd36c2418387bac55a246d67a2>:0 
  at DebugUtil.LogErrorArgs (UnityEngine.Object context, System.Object[] objs) [0x00000] in <eeaae6bd36c2418387bac55a246d67a2>:0 
  at DebugUtil.LogException (UnityEngine.Object context, System.String errorMessage, System.Exception e) [0x00000] in <eeaae6bd36c2418387bac55a246d67a2>:0 
  at StateMachine`4+GenericInstance[StateMachineType,StateMachineInstanceType,MasterType,DefType].ExecuteActions (StateMachine`4+State[StateMachineType,StateMachineInstanceType,MasterType,DefType] state, System.Collections.Generic.List`1[T] actions) [0x00000] in <8543f453fe4a4a6296c5be748aa9bf29>:0 
  at StateMachine`4+GenericInstance[StateMachineType,StateMachineInstanceType,MasterType,DefType].PopState () [0x00000] in <8543f453fe4a4a6296c5be748aa9bf29>:0 
  at StateMachine`4+GenericInstance[StateMachineType,StateMachineInstanceType,MasterType,DefType].GoTo (StateMachine+BaseState base_state) [0x00000] in <8543f453fe4a4a6296c5be748aa9bf29>:0 
  at StateMachine`4+Parameter`1+Transition[StateMachineType,StateMachineInstanceType,MasterType,DefType,ParameterType].Evaluate (StateMachine+Instance smi) [0x00000] in <8543f453fe4a4a6296c5be748aa9bf29>:0 
  at StateMachine`4+Parameter`1+Context[StateMachineType,StateMachineInstanceType,MasterType,DefType,ParameterType].Set (ParameterType value, StateMachineInstanceType smi, System.Boolean silenceEvents) [0x00000] in <8543f453fe4a4a6296c5be748aa9bf29>:0 
  at StateMachine`4+TargetParameter+Context[StateMachineType,StateMachineInstanceType,MasterType,DefType].Set (UnityEngine.GameObject value, StateMachineInstanceType smi, System.Boolean silenceEvents) [0x00000] in <8543f453fe4a4a6296c5be748aa9bf29>:0 
  at StateMachine`4+TargetParameter+Context[StateMachineType,StateMachineInstanceType,MasterType,DefType].OnObjectDestroyed (System.Object data) [0x00000] in <8543f453fe4a4a6296c5be748aa9bf29>:0 
  at StateMachine`4+TargetParameter+Context+<>c[StateMachineType,StateMachineInstanceType,MasterType,DefType].<.cctor>b__11_0 (System.Object context, System.Object data) [0x00000] in <8543f453fe4a4a6296c5be748aa9bf29>:0 
  at EventSystem+Entry.Invoke (System.Object data) [0x00000] in <eeaae6bd36c2418387bac55a246d67a2>:0 
  at EventSystem.Trigger (UnityEngine.GameObject go, System.Int32 hash, System.Object data) [0x00000] in <eeaae6bd36c2418387bac55a246d67a2>:0 
  at KMonoBehaviour.Trigger (System.Int32 hash, System.Object data) [0x00000] in <eeaae6bd36c2418387bac55a246d67a2>:0 
  at KPrefabID.OnCleanUp () [0x00000] in <eeaae6bd36c2418387bac55a246d67a2>:0 
  at KMonoBehaviour.OnDestroy () [0x00000] in <eeaae6bd36c2418387bac55a246d67a2>:0 
Build: U57-702808-SCRPN

The area was blocked off, currently am trying to reproduce.