テストプレイ中に稀に以下のエラーが発生して止まってしまうのですが、対処出来なくて困っています。
当方Unity5。
エラーの発生箇所がeditorやInspector臭いのですが、特にカスタマイズはしてないです。
せいぜい、OnValidate()でInspectorの変更をオブジェクトに適用させるくらいです。

MissingReferenceException: The object of type 'GameObject' has been destroyed but you are still trying to access it.
Your script should either check if it is null or you should not destroy the object.
UnityEditor.GameObjectInspector.DoRenderPreview () (at C:/buildslave/unity/build/Editor/Mono/Inspector/GameObjectInspector.cs:680)
UnityEditor.GameObjectInspector.OnPreviewGUI (Rect r, UnityEngine.GUIStyle background) (at C:/buildslave/unity/build/Editor/Mono/Inspector/GameObjectInspector.cs:745)
UnityEditor.Editor.OnInteractivePreviewGUI (Rect r, UnityEngine.GUIStyle background) (at C:/buildslave/unity/build/artifacts/generated/common/editor/EditorBindings.gen.cs:309)
UnityEditor.ObjectPreview.DrawPreview (IPreviewable defaultPreview, Rect previewArea, UnityEngine.Object[] targets) (at C:/buildslave/unity/build/Editor/Mono/Inspector/Editor.cs:225)
UnityEditor.Editor.DrawPreview (Rect previewArea) (at C:/buildslave/unity/build/Editor/Mono/Inspector/Editor.cs:522)
UnityEditor.InspectorWindow.DrawPreviewAndLabels () (at C:/buildslave/unity/build/Editor/Mono/Inspector/InspectorWindow.cs:759)
UnityEditor.InspectorWindow.OnGUI () (at C:/buildslave/unity/build/Editor/Mono/Inspector/InspectorWindow.cs:386)
System.Reflection.MonoMethod.Invoke (System.Object obj, BindingFlags invokeAttr, System.Reflection.Binder binder, System.Object[] parameters, System.Globalization.CultureInfo culture)
(at /Users/builduser/buildslave/mono-runtime-and-classlibs/build/mcs/class/corlib/System.Reflection/MonoMethod.cs:222)


稀にしか発生せず結構お手上げ状態です。
よろしくお願いします。