bug: Vendor data reset when saving own billing address form

[nordmograph]

Hello

Some customers came back to me complaining about this little Virtuemart issue.

Weird behaviour: when a vendor edits own billing address ,  some own vendor data is reset:

Vendor avatar is lost
entry in #__virtuemart_medias is kept while
entry in #__virtuemart_vendor_medias is removed.

Sometimes vendor phone field is reset too

I'll have a look at
controllers/user.php
and
administrator/components/com_virtuemart/models/user.php

but any help/clue welcome