[Webkit-unassigned] [Bug 201048] Animations freeze on elements in shadow tree when layout is invalidated

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=201048

--- Comment #7 from Liam DeBeasi <ldebeasi at gmail.com> ---
(In reply to Ryosuke Niwa from comment #6)
> It would be ideal if we had a minimum reproduction that doesn't rely on
> custom elements instead of https://codepen.io/liamdebeasi/pen/YzKNGzW but
> it's not a big deal. I can easily make a reduction myself.
> 
> FWIW, I don't think I can work on it anytime soon due to other commitments.
> Having said that, it's probably not that hard to diagnose this issue even as
> the first WebKit bug for someone so if you can find someone who can work on
> this that might work too.

I can try and diagnose it a bit, though I am not very familiar with the WebKit code base.

What kind of reproduction would be helpful here? The issue only happens with custom elements/Shadow DOM, so I am not sure that a reproduction without custom elements is possible here.

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