Dashboard doesn't display custom post type

Hi everyone!
I'm started using MB some weeks ago and am facing currently the following issue:

I'm using a frontend submission form (which works perfectly fine) for a custom post type and wanted to display a dashboard where users can edit and delete their posts. However: the dashboard seems to ignore the custom post type. I tried several page IDs in the shortcode, but either just the usual posts of my blog are displayed, or none at all. I was playing around with some other attributes within both shortcodes (like post_type) but nothing helped...

My Shortcodes as they currently are:
[mb_frontend_form id='gleichgesinnte' post_type="29132" confirmation="Vielen Dank! Dein Formular wurde abgeschickt und Deine Anzeige wurde kreiiert. Wenn Du noch weitere Fragen hast, schicke mir gerne eine Mail (siehe unten auf der Homepage). Vielen Dank und liebe Grüße, Philip" edit="true" allow_delete="true"]
[mb_frontend_dashboard id='gleichgesinnte' edit_page="28970"]

I think the problem is quite similar to this problem, however when the ID is set on the page where the form is submitted, my usual blog posts are displayed (in admin - others did not contribute).
metabox.io/support/topic/dashboard-cant-get-submitted-custom-posts-stored-in-custom-table/

Would be amazing if you could help!

Best regards from Germany,
Philip