Copy / Paste Color Error

Hi,

Suddenly, after the last update, my Illustrator started experiencing a color bug. (and my three colleagues also). 
I copy and paste an image from one document to another, and then it all gets messed up.

original image (these are all screenshots)

after paste:

if i zoom in (looses color  and gets strange stripes)

even more zoom:

I'm in a MAC Studio (2025) with the latest version of Illustrator. Working as usual, in CMYK mode.


any tip?

Thanks!