Preview mode doesn't match the form in the builder

Hi,

I'm facing a problem with the preview mode of forms. In the builder everything seems to be working fine but changes aren't updated to the published form.

I had a somewhat similar problem previously: https://www.jotform.com/answers/1104211-Preview-mode-seems-totally-different-than-the-form-in-the-builder/?entrymessage=10732640770

However, this time the white form background is missing as well as the Next button. When I type something in the text area in the preview mode, the form background magically appears and everything works fine after that. If I delete the text, the form background disappears with it. 

And once again, duplicating the form or re-adding the form elements doesn't solve the problem.

Thanks.
Paula.

Never mind, sorry for the bother. The form started working again. Thanks anyway :)