When using the "Show hierarchy" button, the amount of issues is not summed correctly between List and Detail view

This varies as the sum is considering only the parent, and not the collapsed children below them.

List view shows 18 work items:

Detail view shows 19 work items (correct amount):

If you disable the "Show hierarchy" in List view, it shows 19 work items too:

It would make more sense if the amount considered is always the summed up value (all work items) - 19 items