- Fixed core server bugs including rolling upgrade diagnostics, Windows handle counting fallback, and node maintenance state replication; CLI warnings now respect JSON formatter
- Resolved MQTT plugin exceptions, QoS 0 message drop metric reporting, and AMQP 1.0 connection refusals in HTTP and LDAP auth plugins
- Updated dependencies (osiris 1.6.3) and enforced Erlang 25+ requirement (nodes fail to start on older Erlang)
RabbitMQ 3.12.3
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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.