I updated all my sites to the latest GP theme and Premium, and have an issue now on (of course!) my flagship site: the primary menu bar text is black (on dark blue), which of course makes it very difficult to read. The secondary menu (very top edge) is correct: https://thisistrue.com
I opened the customizer to fix it, but when the customizer is active (and only then), it shows correctly. I tried to reset the colors anyway, but since I was changing from ffffff to ffffff, it wouldn’t let me save because there was no change. So I set all the whites to fffff0, which worked, and then back to ffffff, and the colors look OK now.
Just mentioning it so maybe you can spot the bug, and to provide a quick fix for anyone else who has a similar problem.