Navigation in filter with hierarchy: No root (/parent?) values displayed
After loading structures DSD_NATIONAL_ACCOUNTS, DF_NATIONAL_ACCOUNTS and related data from DF_NATIONAL_ACCOUNTS.csv (files attached) the "Pacific Island Countries and territories" filter doesn't show any filter values, see this screenshot:
Note that there is only data at lower levels in the hierarchy, but not at the single root value, which is "_T".
The issue might be caused by a bug that occurs when there is only one single (root) parent and if that parent has no data, here "_T". Actually, when removing the parent of the "_TXPNG" code (so that it is now also located at the root), the data-less "_T" code is shown again:
Note also that the bug might also occur at other levels, which means when there is only one value at a parent level and this parent has no data. But this has not been tested.
Example files to reproduce the issue: