PDF and Buddpress memberpage

With great pleasure I am making use of your wonderful plugin; it works fine om my pages by using the shortcode. Unfortunately the plugin does not work on one page. I use Buddypress memberpages (only for logged-in users) for several groupes. The url is: https://mysite/members/a, https://mysite/members/b, https://mysite/members/c and so on. This page only has an ID in his “master” page: https://mysite/members, which is a normal WP-page. Using the shortcode in this page it works fine: it generates a pdf called: https://mysite/members/?pdf=1343. However, when I use the shortcode in the several groups memberlist-pages above, the plugin makes not a PDF, but copies the page in a new tab called for example. https://mysite/members/a/?pdf=0.
Is there any way to make the plugin work for my memberlist-pages, e.g. by making a PDF by name and not by ID?