I'm trying to figure out a very vexing bug (which might well be a mobile Safari issue) where opening a URL from an app is causing the page to load with a large negative scroll value and only the Smart Banner appearing.
In the example below, window.scrollY = -324. This is on iOS 8.1.2, both iPad and iPhones.
The issue resolves itself after any touch or rotate event, suggesting the browser knows that window.scrollY should be 0.
Has anyone dealt with a similar issue?