If more than one exported behavior is referenced as external behavior, the error occurs when debugging one behavior.
KeyNotFoundException: The given key '* - Behavior' was not present in the dictionary.
System.Collections.Generic.Dictionary`2[TKey,TValue].get_Item (TKey key) (at <cb3602b5bf2148caa08db7780ec02b19>:0)
BehaviorDesigner.Runtime.BehaviorManager.GetTaskList (BehaviorDesigner.Runtime.Behavior behavior) (at <4a24131e73ec49f7805f3dfb6a69fa78>:0)
BehaviorDesigner.Editor.BehaviorDesignerWindow.UpdateNodeTaskMap () (at <d6203e70841f4bfeb69e5def378a2bc0>:0)
BehaviorDesigner.Editor.BehaviorDesignerWindow.LoadBehavior (BehaviorDesigner.Runtime.BehaviorSource behaviorSource, System.Boolean loadPrevBehavior, System.Boolean inspectorLoad) (at <d6203e70841f4bfeb69e5def378a2bc0>:0)
BehaviorDesigner.Editor.BehaviorDesignerWindow.LoadBehavior (BehaviorDesigner.Runtime.BehaviorSource behaviorSource, System.Boolean loadPrevBehavior) (at <d6203e70841f4bfeb69e5def378a2bc0>:0)
BehaviorDesigner.Editor.BehaviorDesignerWindow.BehaviorSelectionCallback (System.Object obj) (at <d6203e70841f4bfeb69e5def378a2bc0>:0)
UnityEditor.GenericMenu.CatchMenu (System.Object userData, System.String[] options, System.Int32 selected) (at <376f43f3329c444db4613258b017d5db>:0)
KeyNotFoundException: The given key '* - Behavior' was not present in the dictionary.
System.Collections.Generic.Dictionary`2[TKey,TValue].get_Item (TKey key) (at <cb3602b5bf2148caa08db7780ec02b19>:0)
BehaviorDesigner.Runtime.BehaviorManager.GetTaskList (BehaviorDesigner.Runtime.Behavior behavior) (at <4a24131e73ec49f7805f3dfb6a69fa78>:0)
BehaviorDesigner.Editor.BehaviorDesignerWindow.UpdateNodeTaskMap () (at <d6203e70841f4bfeb69e5def378a2bc0>:0)
BehaviorDesigner.Editor.BehaviorDesignerWindow.LoadBehavior (BehaviorDesigner.Runtime.BehaviorSource behaviorSource, System.Boolean loadPrevBehavior, System.Boolean inspectorLoad) (at <d6203e70841f4bfeb69e5def378a2bc0>:0)
BehaviorDesigner.Editor.BehaviorDesignerWindow.LoadBehavior (BehaviorDesigner.Runtime.BehaviorSource behaviorSource, System.Boolean loadPrevBehavior) (at <d6203e70841f4bfeb69e5def378a2bc0>:0)
BehaviorDesigner.Editor.BehaviorDesignerWindow.BehaviorSelectionCallback (System.Object obj) (at <d6203e70841f4bfeb69e5def378a2bc0>:0)
UnityEditor.GenericMenu.CatchMenu (System.Object userData, System.String[] options, System.Int32 selected) (at <376f43f3329c444db4613258b017d5db>:0)