I wanted to take a quick moment to provide you some context on why you see that in the Designer. It relates to how we try to deduce if an item is “empty” or not as part of the “Show Empty Elements” feature.
I double-checked to confirm my suspicion by using the browser web inspector to look at what the HTML of those slides looked like.
It doesn’t appear in published sites because those
wf-* classes are part of the Webflow Designer UI and don’t ship with published sites.
We will continue experimenting with changing the heuristic of that from time to time, but there are no active plans to change it presently. I hope that being aware of this detail will help at least recognize the dotted line in the future and why it’s there in certain situations.
If you can include a link to the published site, a screenshot of what to look for, and what browser is being used (if specific to one browser) I’d be happy to take a look there as well.