Colours appear different when saving as PDF
Hi all,
Since the latest update of Illustrator(v28.4) and Acrobat (unsure where to confirm version, but it now has AI integrated), I am having an issue with colours from my artboard being fairly more vibrant, almost as if they are RGB values, despite using CMYK swatches and using CMYK workspace.
This issue doesn't occur when Printing as PDF however, or when actually being printed and the CMYK result is accurate.
I have noticed it appear particularly more obvious when the print is blue, but does seem to affect all colours.
Has anyone else incured this before?
I have attached a screenshot with an example of my Artboard next to my result with Save as PDF

