After upgrading to 8.2.1 I found some subreports are no longer displayed. The parent report shows white space where the subreport should be. The problem is occurring when the subreport is on a footer band with PageBreak = AfterBand. If I set the footer band PageBreak = None then the subreport will show as expected. Unfortunetly I have cases where I need PageBreak = AfterBand.
I've succeeded in reproducing the issue with the help of your test project. I've modified it to make it simpler, and also attached it to this ticket.
Please wait, and you will be notified when this issue is fixed in our internal builds.
For now, as a workaround, you can set the PageBreak property to None, and use the XRPageBreak control to insert a page break at the bottom of the GroupFooterBand.
Sorry for any inconvenience.
Best regards, Alan.
R&D, .NET Team.