Lightroom Version 8.2 Update Edited / Changed Photos

Hi All,

Noticed something very odd with my images once updating Lightroom to 8.2 on my Macbook lastnight - colours immediately seemed washed out and almost desaturated.

Slept on it, then updated my PC in the morning with a before and after screenshot to make sure I wasn't insane - and as attached, the photo looks wildly different (histogram included) and the *ONLY* change is the actual Lightroom version - this is extremely confusing and concerning, as this example is present in *ALL* of my backed up photos and has drastically changed the appearance of them.

What the heck has happened here?