It seems that Webflow had recently updated the class duplication and it’s totally breaking it on my websites.
Here is the problem:
I select a previously created element (in my case I’ve tried only with div component) and I click on the duplicate class button, then I rename it with a totally unused name class. Great I can see my new class created and associated with my component. Then I wait a little bit to see the green check mark to be sure my modification is saved. Once it turn green I refresh the page… And here is the problem! My component doesn’t have any class associated to it and my newly created class doesn’t exist.
This is for me a huge problem I’m working on websites that really need this feature in every day life for development.