Slow Printing - Known Issue

Hi,

We have an issue where PDFs are printing very slowly on the printers. This is random and the same docuement can be printed again which prints out at a normal speed.
I have found an issue listed on here https://helpx.adobe.com/uk/acrobat/kb/known-issues-acrobat-dc-reader.html but would like futher information on what the exact symptoms are.

It is not possible to change the driver (PCL6) just to test as there is print management software and macros in place.

Thanks