gallery/image

if( !is_array($user_attachments) || ( is_array($user_attachments) && $user_attachments[0]['src'] == "" ) ){

this IF statement needs to be fixed or somewhere above it.
user_attachments is empty as in the value of $user_attachments[0][‘src’] = “”

if a default image exists it merges with user_attachments

so we now have a user_attachment array that has index 0 as the default image and index 1 as “”.

is_array user_attachments is always going to be true whether or not there is an default image

so if there is a default image then $user_attachments[1][‘src’] will be “”

you will need to unset user_attachment if there is no default image

then you can go through the old image system where the ‘images’ field had images for gallery.

reason for above is i had ‘images’ set with images.
when transferred i added a featured image and the gallery didnt show up but the featured image did