[Webkit-unassigned] [Bug 274156] New: [iOS/iPadOS] Rubberbanding is sluggish, when "Open in XYZ-App" Bar appears on top of the screen

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=274156

            Bug ID: 274156
           Summary: [iOS/iPadOS] Rubberbanding is sluggish, when "Open in
                    XYZ-App" Bar appears on top of the screen
           Product: WebKit
           Version: Safari 17
          Hardware: iPhone / iPad
                OS: iOS 17
            Status: NEW
          Severity: Normal
          Priority: P2
         Component: Scrolling
          Assignee: webkit-unassigned at lists.webkit.org
          Reporter: mehmet.sahin at gmx.net
                CC: simon.fraser at apple.com

Created attachment 471401

  --> https://bugs.webkit.org/attachment.cgi?id=471401&action=review

demo of the bug

iOS 17.5
iPadOS 17.5
App: Safari

Steps to reproduce:

1.) Install the YouTube-App
2.) Visit www.google.com
3.) Search for "youtube"
4.) On the search results, do a right-click on youtube and select "Open in the background".
5.) Switch to the youtube tab in Safari
6.) Notice the "Open in XYZ-App" Bar on the top of the screen
7.) Now scroll down and again to the top of the screen, so that rubberbanding happens on top of the screen.

Actual: The Rubberbanding on top of the screen is sluggish.

Expected: A smooth Rubberbanding on top of the screen.

Looks like the page reload indicator conflicts with the bar.

A demo is attached.

Thanks for checking.

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