Rechnungsbegründenes (embedded) PDF not beeing displayed in Zugferd, but works fine in XRechnung

[neuffer]

I stumbled over a bug with embedded PDFs (Rechnungsbegründende Dateien) in Zugferd Invoices.

The same file embedded to an XRechnung displays fine in Quba.

Both test invoices were created with the PDF24.org E-Rechnung tool.
TestRechnung-202412001-1234.pdf
Hmmm... for some strange reason it doesn't let me upload the XRechnung xml version of the invoice.....
Quba is able to display the Timesheet PDF which is embeded in the XRechnung without a hitch.

[jstaerk]

dupe of #29