Printing PDF file hangs, from Mac

[david_beav]

Frequently (not predictably), when I try to print a PDF from the Preview app on my Mac, the print job just hangs.  The Mac's print window shows "Printing - Connected to Printer , I hear the printer wake up, its screen shows "Printing Document", but nothing happens. After 5 min or so, the Mac driver Pauses,  but the printer still shows Printing Document.  The job sits in the Mac's print window forever, until I cancel it.   After a while longer, the printer times out and resets back to the home screen.

Yes, I've updated printer firmware and Mac drivers... I do this every time a new version comes out and dream that it was fixed.  I just installed the 6/6/2020 versions, and the first thing I tried to print after the upgrade, hung.

- This seems to happen more often with PDF files that are bit-mapped scans of a page, rather than files that are "printed to PDF".

- These files always print fine to my LaserJet 3600 printer.   

- Docs print fine from all other apps. Nobody else on the network has reported problems. 

- When it does work correctly, the Mac window goes to "Waiting for Job to Complete" and then it prints.

- The printer and my Mac are both on Wifi. The access point is in my office so connectivity is good.

- Sometimes I try with Acrobat Reader instead of Preview, but I don't have good logs of whether that works better than with Preview. 

I see a few other "trouble printing PDF from a Mac" reports in the support system, and I've tried all their recommendations. (Except the one reply that recommended "Use Windows instead").

Anyone have any thoughts at all?   Is there any debugging mode I can drop into that would show where the job is when it hangs?