I have set my background image to “fixed”, and when previewing on Webflow, works fine, even works on a published site on PC.
But when I open a published website with my phone, image acts as though it’s set to “not fixed”.
I wonder if it has something to do with using the Body element. Perhaps do a quick test using a Div instead of the Body like below (Body 12 class was renamed Page Wrap).
Otherwise make the Page Wrap position: relative and add another Div or Image element for the background with position: fixed