If you click on the latest project, you see this pop-up. If I click on e-mail, I see a list of emails in chrome. If I click on an email, the textfield will be shown in yellow color.
Okay, now that’s weird. I have autocomplete turned on in Google Chrome, and I don’t see the input:-webkit-autofill style, and autocomplete for that field is properly turned off on my end. Those grey styles in your last screenshot isn’t added by Webflow at all, but by Google Chrome (“user agent stylesheet”). As I do not see it, perhaps you might have an extension that overrides default Google Chrome functionality.