- Fix regression from 3.8.17 where queues with per‑message TTL could lose index recovery after restart
- Requires Erlang 23.2 (supports Erlang 24); upgrade recommended for all users
RabbitMQ 3.8.21
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Core server bug fixes: duplicate direct‑reply deliveries, quorum queue recovery issues, malformed AMQP 1.0 frames, topic‑exchange wildcard limits, and OAuth proxy header handling.