I have seen several parts where the feature tree will expound all after a rebuild or a save or an open. Nothing I do (ctrl+c or collapse items has any effect.
This is not unique to sheet metal, I've seen it in weldments also. I think it's confined to when a cut list is used.
I am currently using SW 2019 sp05 but I've seen this as fare back as SW 2017
SolidworksUser Interface