[Webkit-unassigned] [Bug 177646] New: Scroll containers with "-webkit-overflow-scrolling: touch" don't always get scroll handles on scroll

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=177646

            Bug ID: 177646
           Summary: Scroll containers with "-webkit-overflow-scrolling:
                    touch" don't always get scroll handles on scroll
           Product: WebKit
           Version: Safari 10
          Hardware: iPhone / iPad
                OS: iOS 10.3
            Status: NEW
          Severity: Normal
          Priority: P2
         Component: CSS
          Assignee: webkit-unassigned at lists.webkit.org
          Reporter: contact at benfrain.com

This is iOS specific so view the following reduction on an iOS device:

https://codepen.io/benfrain/full/rGwWae

All of the horizontal panes are identical. However, only some of the scroll panes get the scroll handle when scrolled. If the problem doesn't occur first time, try refreshing and immediately scrolling some of the panes.

Live site example: https://mobile.bet365.com/#type=Splash;key=2;ip=0;lng=1 

Scroll down that page a little to the list of race times and scroll those. Again, some exhibit the scroll bar handle, some don't.

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