There is a bug that when Safari starts up, and reloads the tabs from
the previous session **and** there is a service worker registered for
the scope of the document, all cookies marked as `SameSite=Lax` won't be
sent in the request.
This puts Discourse in a **very** broken state, where:
- You appear as a anon user
- Subsequent xhr requests will come with logged in data
- Refreshing doesn't log you in (cookies are still not sent)
- Clicking on the address bar and hitting enter, will log you in (as it
will finally send those damn `SameSite=Lax` cookies.
Looks a lot like a corner case missed by the fix at
https://trac.webkit.org/changeset/241918/webkit
2a0cd066a7