The contacts can record phone numbers, email addresses and postal addresses with a label indicating a type or a location.
Some labels like "home" and "work" do not do problems, but many other labels provided in the Android contacts either match technologies that are not or little used today, or are not provided in Vcard format standard labels and give different results when exporting ...
So I chose to limit the labels offered to those in common use today and have no problems for export. In other cases or if there is no label, "Other" will be displayed.