3.2.15.9925 custom fields type string do not keep the default value when saving

[doc_denis]

hello,
with the version "com_virtuemart.3.2.15.9925"
custom fields of type "string" do not keep the default value when saving.

with the version "com_virtuemart.3.2.15.9877" it works properly

thank-you
french user.
joomla 3.8.12

[Milbo]

Thank you very much. Found and fixed.