This is a very unusual bug that I can’t properly reproduce.
About 3-4 times in the past day or two, I will make a change in the designer (div from 400px to 300px) by typing in the numbers and pressing enter. The layout panel reflects the change, but the central page preview does not. Somehow, the change hasn’t taken effect and I need to retype “300px” and press enter again. And then the div finally changes to 300px.
It’s very consistent when it does happen: first change only changes the value in the layout panel, but not the actual site (confirmed by publishing in this weird meta-state). Only after I re-type and press enter does the central page preview actually show the change.
I used to have this bug maybe once a month, but now that I’m using Webflow 6-8 hours a day, it’s happening at least 3-4 times per day.
This is using the latest Chrome Version 78.0.3904.70, if that matters, with zero extensions (i.e., the test environment).