LIVE: BLUEPRINT: Compiling a parent blueprint of a child blueprint causes reference error in output log

When a user compiles a parent blueprint, this error appears in the outpug log for the child blueprint:
 
Warning: USimpleConstructionScript::FixupRootNodeParentReferences() - Couldn't find inherited parent component 'WeaponMesh' for 'Barrel' in BlueprintGeneratedClass 'REINST_WeaponMouseGun_C_209' (it may have been removed)

1. Make a new project.
2. Add new blueprint, based on actor, this is the parent.
3. First add a static mesh component to it then a scene component.
4. Compile. No warning in the log.
5. Make a new BP based on this, the child.
6. Add a scene component to it.
7. Compile. No warning.
8. Go back and compile the parent again, even though it has not changed. # The warning should show up.

Results:
Error in description appears in the output log of the editor

Expected:
No output log error occurs.
 

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