When you request a report for a custom area it should take roughly 10-15 minutes to generate. Whilst the report is generating it will read Report Pending on the Manage Custom Areas page.
Report stuck pending:
If the report has been pending for a considerable amount of time (more than a couple of hours) then send us an email on firstname.lastname@example.org and we will investigate.
If you bulk update your reports using the Update All Reports feature, it may take a few hours for all the reports to publish. You can keep an eye on how many reports are left to publish on the reports tab.