[Webkit-unassigned] [Bug 230343] New: Page does not reload properly when cold starting Safari

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=230343

            Bug ID: 230343
           Summary: Page does not reload properly when cold starting
                    Safari
           Product: WebKit
           Version: Safari Technology Preview
          Hardware: Unspecified
                OS: Unspecified
            Status: NEW
          Severity: Normal
          Priority: P2
         Component: History
          Assignee: webkit-unassigned at lists.webkit.org
          Reporter: mads at langesund.org

When opening Safari "cold" (aka. exiting Safari and opening later), the current page is loaded with stale/old content, even though I use `Cache-Control: max-age=0, must-revalidate`. The user has to manually reload the page to get the updated content.
I can use `Cache-Control: no-store` to force reloading, but that would break BFCache, which is somewhat critical for the user experience.

This bug is present in Safari 14 and latest Safari 15.

Is there something I'm missing? Should I do a workaround?

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