Bug 274828 - REGRESSION (iOS 17.0-17.4?): Zooming and scrolling break on baidu.com
Summary: REGRESSION (iOS 17.0-17.4?): Zooming and scrolling break on baidu.com
Status: NEW
Alias: None
Product: WebKit
Classification: Unclassified
Component: Scrolling (show other bugs)
Version: WebKit Nightly Build
Hardware: Unspecified Unspecified
: P2 Normal
Assignee: Nobody
URL:
Keywords: InRadar
Depends on:
Blocks:
 
Reported: 2024-05-29 06:11 PDT by Ali Juma
Modified: 2024-06-04 09:51 PDT (History)
3 users (show)

See Also:


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Description Ali Juma 2024-05-29 06:11:48 PDT
This was originally reported at crbug.com/342446324 for Chrome on iOS, but also reproduces on other browsers on iOS (I tested on iOS 17.5 in Safari, Firefox, and Edge).

This does not reproduce on iOS 17.0 but does on 17.4+.

Steps to reproduce:
1) Visit https://baike.baidu.com/reference/1603667/9d2aOhaqcu1GSI-fs51AQzCLGC5YPgcKZrRUpGQE4p-8QgOI1F-nrZ9KhdTKhNTJH_gTeRAxTjE-WFrZSAg

2) Zoom in all the way.

3) Scroll all the way to the bottom.

4) Try to zoom out or scroll back up.

At step 4, zooming and scrolling no longer work.
Comment 1 Radar WebKit Bug Importer 2024-05-29 09:24:56 PDT
<rdar://problem/128946135>
Comment 2 Simon Fraser (smfr) 2024-05-29 11:12:07 PDT
We've been able to reproduce this on iOS 16.6.1 and 17.0. Is it really a regression, or just something the site is doing?
Comment 3 Ali Juma 2024-05-29 11:41:04 PDT
(In reply to Simon Fraser (smfr) from comment #2)
> We've been able to reproduce this on iOS 16.6.1 and 17.0. Is it really a
> regression, or just something the site is doing?

Oh thanks for checking, in that case the site might be doing something weird to trigger this state.
Comment 4 Karl Dubost 2024-05-31 02:06:15 PDT
So fwiw on Firefox Android, and Chrome Android
accessing https://baike.baidu.com/reference/1603667/9d2aOhaqcu1GSI-fs51AQzCLGC5YPgcKZrRUpGQE4p-8QgOI1F-nrZ9KhdTKhNTJH_gTeRAxTjE-WFrZSAg

We can NOT
* scroll 
* zoom in
Comment 5 Karl Dubost 2024-06-04 00:01:57 PDT
Ali Juma,

did you try on Android. 
Because I tried on Firefox and Chrome and it is even worse there, that might be a site bug to fix.
Comment 6 Ali Juma 2024-06-04 06:15:37 PDT
On Android I can repro extreme slowness but couldn't get to a point where zooming and scrolling are entirely stuck (perhaps getting entirely stuck is device dependent). In any case, the site behaves poorly across browsers so perhaps we should close this as Invalid.