Create new Page

A bug perhaps.
When I go to manage the gallery, my previous method before upgrading was to Create a new page under a parent “gallery” page. That drop down box to select a parent no longer populates with anything other than main. So I created a new page under the Main Page, and then went to edit it, and the shortcode populated didn’t include the gallery number.
I have a work around, but it’s tedious; added the shortcode gallery id, edit the page so that it’s under a parent page, back to manage galleries and then find it in the page link drop down and save that configuration.

https://ww.wp.xz.cn/plugins/nextcellent-gallery-nextgen-legacy/