iOS 15 airprint?

Sometime around when the iOS 15 installed on my devices, I've had a peculiar problem printing to my Canon MF634Cdw printer. Air print connects and finds my printer, and allows me to set up the job and transmits it to the printer. But everything prints very lightly, light gray instead of black, light blue instead of dark blue, etc. This is happening with both my iPad 12 and my wife's, and my iPhone 11 and my wife's iPhone X. Printing with my WIN10 desktop everything is as it should be. Help please!