STAMPS NOT PRINTING

Acrobat Pro DC (current version under Creative Cloud subscription):

Print Settings are correctly set to "Documents and Stamps" option (have also tried "Documents and Markups" option with same result).

All Stamps are visible in the Document Preview Window (irrespective of Printer selected for output).

Some Stamps do not print when printing to HP Laser Jet.  Acrobat "Standard Business Stamps" fail to print, however "Custom Stamps" (scanned signatures that I added as Custom Stamps), and Form Field contents do print properly.

All Stamps do "print" when printing to Adobe PDF (layers are properly flattened when re-distilling the file).

Any insight as to why Adobe default type stamps are not printing when document is sent to LaserJet would be appreciated. I am presuming that those Adobe stamps are placed on a different layer than Custom stamps and Form Field entries, and that the Adobe Stamp Layer is not being included when the document is being flattened and sent to the printer for output, but I am at a loss as to why this is occurring, or if my presumption is even accurate.  I was an early adopter of Acrobat, and have been using it since its earliest iterations (thus encountering many anomalies through the years), however this anomaly is unique to me.

Thank you for your assistance and guidance.