This is a phenomenon that just happened this week, It use to work and colleagues to not have this problem with the same structure.
When I have a JIRA structure pinned at a certain parent with 7 levels of hierarchy, and I do an export to excel, it just exports that parent and does not export the entire hierarchy. This used to work last week i.e. it would export the entire hierarchy! Have I changed configuration so it exports only the parent?
BTW, this happens in the structure view.
Thanks