Problem with Excel (XLSX) Export BIRT Master Page

Dear Mates,

I have come across a very common problem When I export to excel my Birt Report containing one master page with some text element and table in layout (detailed) page. The exported excel sheet contains data of master page. Whereas, When I export the same report to XLSX format the export excel sheet don't have data of master page. Could you please help me to fix this issue that Why the data of the master page is not being exported to XLSX format whereas being exported in simple Excel, PDF and other formats.

I have pasted below the snaps of report master page, preview, Exported Excel & XLSX output.