Bug 273424

Summary: [iOS] Restored scroll position is incorrect
Product: WebKit Reporter: Ali Juma <ajuma>
Component: ScrollingAssignee: Nobody <webkit-unassigned>
Status: NEW    
Severity: Normal CC: cdumez, fedegermi, simon.fraser, webkit-bug-importer
Priority: P2 Keywords: InRadar
Version: WebKit Nightly Build   
Hardware: Unspecified   
OS: Unspecified   
Attachments:
Description Flags
Video showing the issue none

Ali Juma
Reported 2024-04-29 12:16:08 PDT
With the following steps, a page is always scrolled down a bit when Safari is re-launched, even when it was scrolled all the way to the top before. 1) Open a new tab. Visit any page (e.g. www.webkit.org). 2) Scroll down (doesn't have to be all the way, any amount will do). 3) Scroll back to the top. 4) Kill and re-launch Safari At this point, the page should be scrolled all the way to the top, but instead it will be slightly scrolled down. Also, the amount of scrolling seems unrelated to the amount of scrolling done at step 2.
Attachments
Video showing the issue (23.10 MB, video/quicktime)
2025-10-23 06:36 PDT, fedegermi 		no flags
Details
View All Add attachment proposed patch, testcase, etc.
Radar WebKit Bug Importer
Comment 1 2024-04-30 11:37:56 PDT
<rdar://problem/127308062>
Simon Fraser (smfr)
Comment 2 2024-04-30 12:01:29 PDT
Do you know if this is a regression from older iOS versions?
Ali Juma
Comment 3 2024-04-30 12:26:47 PDT
(In reply to Simon Fraser (smfr) from comment #2) > Do you know if this is a regression from older iOS versions? This reproduces at least as far back as iOS 15.5 (the oldest simulator I have on my machine).
fedegermi
Comment 4 2025-10-23 06:36:35 PDT
Created attachment 477176 [details] Video showing the issue
fedegermi
Comment 5 2025-10-23 06:37:36 PDT
Do you have updates on this issue? We're still able to reproduce it on Safari on version iOS26.1 beta 3. I attached a video showing the issue on Safari.
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