Adobe Acrobat Reader DC 2019.008.20071 Printing bugs
Good afternoon, I bear some bad news but I'm here to help!
The recent update to Adobe Acrobat Reader DC (version 2019.008.20071) has some issues printing things that previously behaved properly.

I have uploaded an original PDF here and a PDF of what you see upon printing here. My testing notes are in the files, and replicated below.
The Globe:
Bitmap prints in Adobe Acrobat Reader DC 2019.008.20071 with black filling the rectangle of the object. The black is technically part of the raw bitmap, but should not be visible (Addendum: the black of the bitmap has been cut out using a tool in CorelDraw).
Previous versions of Adobe Acrobat Reader DC printed this fine, and Classic Track Adobe Acrobat Reader 2017.008.30051 prints this ok.
The Triangle:
Linear gradient fill created in CorelDraw 2017, prints in Adobe Acrobat Reader DC 2019.008.20071 with whole gradient filling the rectangle around the object.
Previous versions of Adobe Acrobat Reader DC printed this fine, and Classic Track Adobe Acrobat Reader 2017.008.30051 prints this ok.
Second Triangle (shown only in files):
Elliptical gradient fill created in CorelDraw 2017, prints in Adobe Acrobat Reader DC 2019.008.20071 (and other versions) just fine.
General notes:
Printing was tested on Windows 7 and Windows 10.
Printing was tested on 3 FujiXerox printers:
DocuCentre-V C2275
DocuCentre-VI C3370
DocuPrint CP405 d
Printing was tested on Windows 10 print to PDF, and Windows 7 Microsoft XPS DocumentWriter.
The described results above held true for all of the above tests.
Printing to Adobe PDF from inside Adobe Acrobat Reader DC 2019.008.20071 does display on screen correctly (though obviously is not a solution to the above issues).
This bug is very likely related to:
Adobe 19.008.20071 Not Printing Vector Images
and possibly related to:
+other printing related bug reports.
I can upload the CorelDraw file original if that's of use to you.
As an immediate personal fix I've installed the Classic Track version of Acrobat Reader found here. I hope you're able to fix this soon though as we have customers and warehouses that need to be able to print things correctly.
Thanks for your help and I hope you find this useful,
-Brian Houston