Graphic Group highlight selection behavior

Hi, 

I am understanding MicroStation selection behavior for Graphic Group (GG), as there are some legacy models contains such attributes. When reading What is actually a "Graphic Group"? - MicroStation Forum - MicroStation - Bentley Communities I think the behavior is GG should be selected and highlighted as a single element, however when I create a GG (the GG lock is ON) it still select and highlight each component separately. Any idea of the selection behavior?

GG.dgn

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