[Webkit-unassigned] [Bug 273617] New: Scroll position is (sometimes) not correctly restored after restoring a page from the back/forward cache

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=273617

            Bug ID: 273617
           Summary: Scroll position is (sometimes) not correctly restored
                    after restoring a page from the back/forward cache
           Product: WebKit
           Version: Safari 17
          Hardware: iPhone / iPad
                OS: iOS 17
            Status: NEW
          Severity: Normal
          Priority: P2
         Component: Page Loading
          Assignee: webkit-unassigned at lists.webkit.org
          Reporter: random_n0body at icloud.com
                CC: beidson at apple.com

Created attachment 471249

  --> https://bugs.webkit.org/attachment.cgi?id=471249&action=review

Video showing how the scroll position is not correctly restored when going back, and back/forwards

How to reproduce quite reliably on a test page:

1. Go to https://webkit-bfcache-scroll-restore-bug.myshopify.com/collections/all
2. Enter password rtamay
3. Scroll down a bit (maybe to product 50)
4. Click a product
5. Go back

Expected behavior:

The scroll position is restored to where one left off

Actual behavior: there's sometimes some glitching but 3/4 times one ultimately ends up at nearly the top of the page, as can be seen in the attached video on latest ios safari (Mozilla/5.0 (iPhone; CPU iPhone OS 17_4_1 like Mac OS X) AppleWebKit/605.1.15 (KHTML, like Gecko) Version/17.4.1 Mobile/15E148 Safari/604.1).


The scroll position is correctly restored in all other browsers and also on desktop safari, just not iOS.
It has something to do with the back/forward cache because when just reloading the page the scroll position is correctly maintained.

-- 
You are receiving this mail because:
You are the assignee for the bug.
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://lists.webkit.org/pipermail/webkit-unassigned/attachments/20240502/7d7cfcd1/attachment.htm>