BI Essentials - Product Assignment Status white color coding in 2021x

Hi,

I have a manufacturing item structure with partial scopes. The root manufacturing assembly is fully scoped to the ROOT_ENG engineering node and the sub assemblies are partial scoped. I'm using 2021x.

When I run BI Essentials to validate part assignment, the root engineering is coded in white which is not part of the colour legends. Does anyone know why the root engineering is marked as white not green given it's fully scoped from a manufacturing assembly?