I’m not sure you can help but I suspect you are more likely to try than the culprit. Can’t hurt to ask. Someone on the IContact form side has updated something that is now overriding the default Generatepress Customizer settings on every page the embed code for the newsletter is on. It’s altering everything, fonts, background colors, padding and margins.
This happened on a live site and when we checked our test site (with old plugins and wordpress) the problem was there too. So we know its something that happened on IContact server and being pushed out.
Do you know of any way we can get somehow get Generatepress and its default styles to override the thing? Am I limited to tracking down everything in the customizer, sticking it in simple css and putting !important on it?