Random clear Edit In Line Object on the map in Editor

Hello.
I have a very strange bug.
I am using a system based on EditInLineObject. Sometimes, for some unknown reason, the editor resets all the specified UObjects on the loaded map IN EDITOR, while I can’t catch the reason.

Out of curiosity, I can note this warning:
LogEditorClassViewer: Warning: Class /Engine/Tutorial/InWorldBlueprintEditing/TutorialAssets/IWBE_Blutility.IWBE_Blutility_C has parent /Script/Blutility.PlacedEditorUtilityBase, but this parent is not found. The Class will not be shown in ClassViewer.

And also that I noticed a bug when running everything in Standalon.

What i checked:
Autosave
Create/Remove EditInLine UObject.
Change Owner Component.

Maybe some have any ideas?