[Webkit-unassigned] [Bug 219872] All our cookies get randomly deleted from the NSHTTPCookieStorage. Could be a cookie sync issue between NSHTTPCookieStorage and WKHTTPCookieStore.

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=219872

--- Comment #10 from exu at linkedin.com ---
(In reply to Geoffrey Garen from comment #9)

Thanks for your suggestions Geoffrey!

We didn't change any of this code on our side, but we started observing increased instances occurring on iOS 14 after we released a version of the app built with the iOS 14 SDK. Could you share some details on why that could be?

> Here's a theory of a change that might help:
> 
> (1) Make sure that all WebViews share the same WKWebViewConfiguration;
> 
> (2) Always use WKHTTPCookieStore to access cookies, and never use
> NSHTTPCookieStore.
> 
> These changes taken together should eliminate a few races between different
> ways to access the same cookies. Maybe those races explain some of these
> issues.

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