Why is Component Pattern revealing hidden features in Assembly?

Question

i am creating a linear pattern of a part in assembly, the part has hidden features. when I create the pattern the hidden features are visible on the patterned parts, but not the original part.

Does this have to do with reference sets? Please provide images with your answer if possible.

Answer 1

Seems to be a reference set problem indeed... Check the reference set of the original component and if present remove from there the xtra face you are now seeing.
That would be your safest bet.