Fields hidden from display don't show up later when required

In views you often hide fields from display to show the data later in overwrites. That doesn't work with views_pdf.

Steps to reproduce:

Have a view with some fields with values (e.g. address fields)
Hide the fields
create a new field (global textarea), overwrite the output and add the prior hidden fields
In the view that works as proposed
In Views_PDF there is no combined output.
when you remove the hide flag, the value is shown in the original field and in the combination.
The same happens when you overwrite e.g. the last field of the address to show the address as one line.

Temporary workaround:
Reduce font size and write the normally hidden fields as white on white. There still is a tiny gap.

Drupal Version 9.5.11
Views_pdf 3.x-dev
tcpdf version 6.7.5
fpdi version 2.5
token version 1.14