iOS Chrome 119 Beta: When exiting an AR QuickLook session the originating HTML page view is broken

[milesgreen]

Description

When exiting an AR QuickLook session, the originating HTML page is scrolled back to the top of the page, and the entire viewport is shifted down the screen making it look broken.

When using inspection tools, it appears that the entire HTML element has been shifted down the screen.

This used to work fine in previous versions where web page would not be scrolled and viewport would not be moved.

Chromium Bug Reported: https://bugs.chromium.org/p/chromium/issues/detail?id=1502773

Live Demo

https://modelviewer.dev/examples/augmentedreality/index.html#ar

Repro steps:

• In iOS Chrome, view above link
• Tap AR button to open astronaut in ARQL
• Exit the ARQL session
• Observe, the HTML page has scrolled back to the top and the entire viewport has shifted down

Similar experience when viewing non Model-Viewer ARQL content. For example, viewing any 3D model from: https://developer.apple.com/augmented-reality/quick-look/

Version

• model-viewer: 3.3.0 (any?)

Browser Affected

• [x] Chrome, version: 119.0.6045.24 beta
• [ ] Edge
• [ ] Firefox
• [ ] IE
• [ ] Safari

OS

• [ ] Android
• [x] iOS, version: 17.2 Beta 3 (21C5046c)
• [ ] Linux
• [ ] MacOS
• [ ] Windows

AR

• [ ] WebXR
• [ ] SceneViewer
• [x] QuickLook

Screenshots

Before ARQL:

After ARQL:

[elalish]

So this is specific to iOS Chrome, and doesn't repro on Safari? Thanks for filing the Chromium bug!

[milesgreen]

So this is specific to iOS Chrome, and doesn't repro on Safari?

Correct. Does not repro in Safari iOS.

It may be a general WKWebView issue, but it does not repro in iOS Firefox (119.2) or iOS DuckDuckGo (7.96.0.0) - at least, not with the versions I'm testing with.

[milesgreen]

Partially fixed in iOS Chrome 123.

Viewport no longer shifted down page.

But, page is still scrolled back to top.