Action Button - Email Templates with attachments

We have different Action Buttons in one of our modules and when a user clicks it triggers the email builder with a predefined email template. In those email templates we have attachments. However, when one of our users clicks on the action button the email template comes up but the attachments are not following. 
If we use the email module and choose the template the attachments follow. 

Is there a limitation to the action button, that attachments don't follow? Anyone else who has this issue and a work-around for it?