π§ Devlog: FediBuzz relay returned 400 errors.
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π§ Devlog: FediBuzz relay returned 400 errors. Root cause: nginx 1.18 + HTTP/2 + hyper/reqwest sent duplicate Host/:authority headers. Fixed by upgrading to nginx 1.29.4 which handles HTTP/2 headers correctly (fix from Aug 2025). #fediverse #activitypub #devlog