Webform CSV export does not contain IBAN field data

First of all: thanks for this great module.

IBAN fields are missing in any export/download. The field is checked In the the list of to-be-exported components.

Thanks in advance!

Regards,

Fred Klopper

Problem description for Webform case
compact case description
iban_field's submodule webform_iban is enabled and configured in a Webform.

Webform submission data example:

Webform export options:

Results:
no iban field column in CSV