Automatic Signed Exchanges (SXGs) Beta Launch

Hi @henshaw. This appears to be a Google bug. The problem is we are interpreting Cache-Control: must-revalidate as equivalent to max-age=0 . This seems wrong per the HTTP spec.

  1. Short term, you can remove the must-revalidate.
  2. Medium term, we’ll try to fix this bug or make some changes to remove must-revalidate.

cc @eva2000

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