Deutsche Post Barcodes print out error - lines missing


I using PDF Architect to combine postage in one document for easy print out.
When I print out the labels the barcode is missing many lines and is not readable by scanners anymore.

with the unedited and uncombined original document I tried printing on physical printer - lines missing in barcode
microsoft to pdf printer - lines missing when opening in pdf architect or adobe reader.
Lines of barcode show correctly on print preview.
document prints fine from adobe reader.

attached a photos of the print outs with pdf architect and adobe reader