I have two sheet metal parts that will not create a flat pattern view in drawings. They will unfold in their part file, but not in a drawing. When I drag the flat pattern into a drawing view, it just keept its folded shape. Both parts started from the same base feature, so they have that in common. I even recreated the parts from scratch and they do the same thing.
I have several other sheet metal parts in the same project and they all unfold fine.
How can I create a flat pattern view with these parts?
Google Drive Links to part files: