[Webkit-unassigned] [Bug 264594] REGRESSION (?): Unresponsive page after back swipe gesture on GitHub

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=264594

--- Comment #7 from pehay <pehay80105 at eazenity.com> ---
(In reply to Abrar Rahman Protyasha from comment #6)
> I can corroborate that this isn’t isolated to back/forward swiping on
> Github. I've seen this happen elsewhere too, I think on facebook.com?

Seems like that "heavy" websites are definitely more affected, especially social networks feeds and recalling lazy loading pages.
It doesn't seem to affect simpler html websites and minimal text blogs. 
Example is: https://daringfireball.net/archive/
Open an archived article and swipe back, it seems pretty responsive.

Another thing to mention: the hanging is reproduced ONLY with swiping touchpad gesture (aka when sliding animation is present). 
Pressing back/forward button in the toolbar (or cmd + left/right arrow key) results in no hanging and correct recalling of the previous scrollbar position.

In Safari on iOS this may happen more rarely and the jumping behaviour, when it happens, seems very rapid with no or little hanging time.

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