Right now we derive the taxonomy name used based on post type, so when "page" is selected as the post type, "page_tag" is used as the taxonomy name. In https://wordpress.org/support/topic/problems-with-tags-in-pages/ a user points out that many people will be using the "post_tag" taxonomy for pages. So, there should be a better way to handle taxonomy selection than assuming the $post_type . '_tag' format.
Right now we derive the taxonomy name used based on post type, so when "page" is selected as the post type, "page_tag" is used as the taxonomy name. In https://wordpress.org/support/topic/problems-with-tags-in-pages/ a user points out that many people will be using the "post_tag" taxonomy for pages. So, there should be a better way to handle taxonomy selection than assuming the
$post_type . '_tag'format.