I mostly work on my Macbook. So I don't know with which update it happened,
but when I opened a project and wanted to change the color the color picker looks like this:
I installed all my Adobe Apps from scratch 2 days ago.
We're so sorry to hear about the trouble. Please try the suggestions shared here https://community.adobe.com/t5/adobe-xd-discussions/color-picker-picks-up-the-light-color-in-adobe-x... and let us know if this helps or if you need any further assistance.