Magento Version 1.9.2.2
FireGento_Pdf Version 1.3.0
When for "Rechnung" the pdf engine is set to "Standard Deutschland" the system will ignore the selection and invoices are generated in the "Standard Magento" style.
The selection of pdf engine works fine for both "Versand" and "Rechnungskorrektur".
Due to the fact that it works everywhere else, might it be, that you have some other extension installed which rewrites the invoice_pdf? It shouldn't be the cache. No other idea currently.
Magento Version 1.9.2.2 FireGento_Pdf Version 1.3.0 When for "Rechnung" the pdf engine is set to "Standard Deutschland" the system will ignore the selection and invoices are generated in the "Standard Magento" style.
The selection of pdf engine works fine for both "Versand" and "Rechnungskorrektur".