I have noticed that on theme update the color palette has to be saved again (without changing anything).
Otherwise the colors do not appear on the pages.
Try to go in Theme Options Panel - Palette and click Save.
Yes I know this works! That’s what I said.
But, so you would have to tell all people to do that after each theme update, wouldn’t you?
Because the theme create a custom css files for palette and other customization. When update the theme this file is reset, and only solution is re-save the theme options panel and this re-create the css file.However I try to find a solution for avoid this.
But genius which you are I am sure you’ll succeed!
Great great job!