How to stop imageCLASS MF642C from printing double sided?

[osya_bender]

The option in the system print dialog is set to "two-side: Off" and greyed out, see below, but printer still print everything as double sided.

Installed latst drivers from here

https://www.usa.canon.com/internet/portal/us/home/support/details/printers/color-laser/canon-color-i...

which dind't help

OS: MacOS 10.15.7

[osya_bender]

This solution still works perfectly fine

https://community.usa.canon.com/t5/Office-Printers/How-do-I-stop-double-sided-or-2-sided-printing-on... (first post on the page)