Discovered a printing error in Acrobat Pro DC. Converted a PDF created in Word using Illustrator to CMYK and just to Black and White. Most of the art is vector or text, however the logos are bitmaps. I copied them into photoshop, converted to grayscale, and pasted them back into Illustrator and saved the file as a high resolution PDF. When printing in Acrobat Pro DC (2019.010.20099) to our Minolta Bizhunb C308, using the function of "Print in grayscale (black and white)" the bitmaps are printed in inverse. File prints correctly without selecting "Print in grayscale (black and white)". Using MacOS 10.13.6. Attached is a screen cap of the print dialog box, and a photo of the result.