[Webkit-unassigned] [Bug 231330] Deadlocks in UIKeyboardTaskQueue from WKContentView(WKInteraction) endSelectionChange.

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=231330

--- Comment #6 from Ali Juma <ajuma at chromium.org> ---
(In reply to Wenson Hsieh from comment #5)
> (In reply to Ali Juma from comment #4)
> > We are still getting reports of this hang on iOS 15.4 beta (19E5225g).
> > 
> > (In reply to Wenson Hsieh from comment #2)
> > > The changes in r280019 would only kick in if the user has Switch Control
> > > active (in Accessibility settings). Is that the case here?
> > 
> > Someone who ran into this hang let us know they don't have Switch Control
> > enabled, but do have an external keyboard.
> 
> Thanks! That's really good to know. To summarize, I think the three clues we
> have so far are that this bug:
> 
> • Reproduces while performing a single tap to change the editable selection
> • Does not require Switch Control to reproduce
> • Reproduces with a hardware keyboard attached
>   (though, it's unclear if it *only* reproduces when a hardware keyboard is
> attached)
> 
> I haven't been able to reproduce simply by tapping around inside
> contenteditable text with a hardware keyboard attached on iPad, so there's
> definitely more to this bug. In the meantime, do you have stats on which
> device models (i.e. iPad vs. iPhone) are experiencing this hang? If a
> disproportionate number of users are hitting this on iPad (despite iPhone
> users being far more common), I think it would be a strong indication that
> the hardware keyboard plays an important role in reproducing this.

The crash is affecting both iPad and iPhone. The most commonly affected devices are older iPhones (6s, 7, 7 plus). 

The iPhone vs iPad breakdown looks similar to the percentage of users on each device.

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