Just tried SN web-app on iOS (iPhone 6s, iOS 14, Safari).
There is a wrong layout after switching from portrait to landscape orientation and back (header and footer are cropped):
Here is the video.
Further investigations: looks like SN thinks, that the address bar is removed (when it is actually not): see another video.
It is exactly the same issue, as described here. Reproducible both on iOS and iPadOS.