267421 2024-01-11 10:27:48 -0800 iOS 17: Back / forward navigation doesn't properly restore scroll position if app banner is present 2024-01-12 00:51:35 -0800 1 1 1 Unclassified WebKit Scrolling Safari 17 iPhone / iPad iOS 17 NEW https://bugs.webkit.org/show_bug.cgi?id=231563 InRadar P2 Normal --- 1 mads webkit-unassigned simon.fraser webkit-bug-importer oldest_to_newest 2004487 0 mads 2024-01-11 10:27:48 -0800 Steps to reproduce: 1. Install app related to www.vg.no: https://apps.apple.com/us/app/vg/id381071021 2. After app is installed, go to https://www.vg.no/?ios-bug=true (query parameter is there to avoid JavaScript workaround) 3. Click a link with https://www.vg.no origin (to get the app banner) on the front page. 4. Swipe back to the front page and the scroll will not be restored. Screen recording of the issue: https://drive.google.com/file/d/17c5NL52DZ4El60k3TiCZL6pyNqK8_vxm/view?usp=sharing Tested on: iOS 17.3 beta (21D5044a) - iPhone 14 Pro 2004488 1 webkit-bug-importer 2024-01-11 10:30:56 -0800 <rdar://problem/120853821> 2004497 2 mads 2024-01-11 10:40:36 -0800 I log out `window.scrollY` + `window.history.scrollRestoration` to the JS console on the when using the `?ios-bug=true` param: https://i.imgur.com/N5qlccp.png 2004631 3 mads 2024-01-12 00:51:35 -0800 A theory is that it happens if the next page has app-banner but the first page doesn't.