Bug 251754 - Weird temporarily artifacts on over scrolling
Summary: Weird temporarily artifacts on over scrolling
Status: NEW
Alias: None
Product: WebKit
Classification: Unclassified
Component: Layout and Rendering (show other bugs)
Version: Safari Technology Preview
Hardware: Unspecified Unspecified
: P2 Normal
Assignee: Nobody
URL:
Keywords: InRadar
Depends on:
Blocks:
 
Reported: 2023-02-05 02:59 PST by Ebrahim Byagowi
Modified: 2023-02-05 08:55 PST (History)
5 users (show)

See Also:

Attachments
weird temporarily artifacts (2.57 MB, video/quicktime)
2023-02-05 02:59 PST, Ebrahim Byagowi 		no flags Details
Artifacts (1.08 MB, video/quicktime)
2023-02-05 03:48 PST, Ebrahim Byagowi 		no flags Details
resize and scroll (9.20 MB, video/quicktime)
2023-02-05 07:02 PST, zalan 		no flags Details
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Description Ebrahim Byagowi 2023-02-05 02:59:37 PST 
Created attachment 464848 [details]
weird temporarily artifacts

Happens in both WebKit (6c4c9810) and Safari 16.2,

1. Open https://codepen.io/jh3y/pen/VwBgPxP
2. Scroll down and up, fast and slowly, like what is shown in the attachment.

Actual:
Weird artifacts will be seen sometimes specially when top overscroll happens.

Expected:
Like Chrome and Firefox

I saw this codepen from this tweet, https://twitter.com/jh3yy/status/1621564942175322112
Comment 1 Ebrahim Byagowi 2023-02-05 03:48:07 PST 
Created attachment 464849 [details]
Artifacts

Something similar also happen while scrolling of https://meodai.github.io/poline/ only in Safari and not Chrome and Firefox on an M1 MacBook Pro.
Comment 2 zalan 2023-02-05 07:02:16 PST 
Created attachment 464851 [details]
resize and scroll

I wasn't able to reproduce it but resizing the content frame makes the gallery move off center while it jumps right back soon after I star scrolling -(which looks very similar to what the attached "artifact" recording shows with the misplaced content). Firefox seems to always center the content.
Comment 3 Radar WebKit Bug Importer 2023-02-05 08:55:58 PST 
<rdar://problem/105058470>