Incorrect dimensions for Page Rect if Page size is A1 on "HP Designjet T790ps"

When setting the paper size to "A1" and with "QPrinter::setPaperSize()" then "QPrinter::PageRect()" returns wrong values for QT59 but it works fine for QT485 when printing on HP Designjet T790ps. Detailed driver information in the attachment

QPageSize ps = getPageSize(pageSize);
printer.setPageSize(ps);
QRectF pageRect = printer.pageRect(QPrinter::DevicePixel);

the above code works fine for PDF exchange, DELL3115cn for both versions of QT.

QT48 example was compiled with MSVC11
QT59 example was compiled with MSVC14