"PDF/Illustrator Import as Separate Layers" - NOT WORKING

What is this button for? It doesnt work!!
When “PDF/Illustrator Import as Separate Layers” in the Advance Preferences is selected it take all the body parts of my illustrator file (which is already layered) and puts them in a Drawing Substitution on ONE layer.

Please put out a NEW video on how to import illustrator files to layers in Harmony 12. Or if anybody knows how to fix this problem, please let me know.

Thank you

Read post No. 7
https://forums.toonboom.com/toon-boom-harmony/general-discussion/import-illustrator-layers-harmony-1001