Different colors of same color text and shapes LBP633Cdw

[regularlabs]

I have a LBP633Cdw.
I am having issues where text and other elements of the same color print as different colors.

As a test, I have a pdf that contains full green text on a full green background. This should result in a green rectangle, with no text visible.

But the result is this:

Even when exporting the file as a PDF/X-1, I get above result.

Running on a MacOS 14.5, (re)installed the LBP633Cdw PS drivers. Still same issue.

PDF can be downloaded from: https://regl.io/colortest.pdf

[regularlabs]

After doing several 'Auto Adjust Graduation', 'Correct Print Color Mismatch' and the 'Clean Fixing Assembly' a couple of times, the result have changed a bit.
The color difference is less, but there is still a difference and there is a dark green outline around the text.

Calling Canon phone support is pretty much useless. After telling them the above steps I did multiple times, the ask me to do the exact same steps again and see what the result is. Well... duh!

[regularlabs]

When I print this via Adobe Acrobat Reader, it will send it to the printer as an image (so not as a vector document). And then it does print as the expected solid green rectangle.
This is of course the same as printing it as a rasterized pixel image.