How to get corresponding face for component in assembly wich is belong to pattern and have another configuration?

Face2 temp = (Face2)partComponentAtAssembly.GetCorrespondingEntity(currentFace);

return null

Face2 temp = (Face2)assemblyDoc.Extension.GetCorrespondingEntity(currentFace);

return null

In attach SW 2016

Code return not null, if part save in same config what be inserted in assy. If part config in pattern set to another = null.

Upd: face object I get from traverce part on myBody.GetFaces() Not directly select by mouse.