[Webkit-unassigned] [Bug 255524] REGRESSION (Safari 16.4): Safari sometimes doesn't send cookies for assets requests and javascript fetch requests

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=255524

David <abs at absd.org> changed:

           What    |Removed                     |Added
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                 CC|                            |abs at absd.org

--- Comment #17 from David <abs at absd.org> ---
We're seeing very similar behaviour on macOS Ventura 13.3.1

- JSESSIONID cookie stops being sent
- Behaviour appears to be triggered by rapid requests - clicking a link to thecurrent page rapidly twice triggers it almost every time. Waiting one second between clicks never appears to trigger it. Having a page make three 

Behaviour present in Safari 16.4

Behaviour not seen:
- In Firefox or Chrome
- If Web Inspector is opened and "Disable Caches" ticked
- In "Private Window"s

Cookies are sent over https and are of the form:
- Set-Cookie JSESSIONID=C567CBF8F644A334F94EA70416C3DEC3; Path=/; secure; HttpOnly; SameSite=strict

Its almost as if Safari has cached some content from before the cookie was issued with "no cookie" state, and then that is polluting some later requests

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