Report Designer - Stop group footers from causing blank spaces on multiple page reports

Example: if you set up an invoice or statement layout and have the transactions appearing in the Details tab, then have a customer account number group footer section giving the totals and perhaps bank details etc etc then this causes blank spaces on all of the pages for that customer except the last one where the footer displays. This really needs configuring so that the group footers don&t reserve space on the pages where they are not displayed, so that the Details section can use up all of the space on the preceding pages. This is a frequent bug-bear with our customers but despite many efforts we&ve not found a solution.