Expected Behavior

The client should not send queued PUBACK packets to the broker upon reconnection.

Current Behavior

An isolated PUBACK packet is being sent to the broker after the client reconnects.

Failure Information (for bugs)

Context

During testing with two clients (one publisher and one subscriber with manual ACK), we observed that terminating and restarting the mosquitto broker multiple times resulted in an unexpected PUBACK packet being sent upon reconnection.

1.Run the mosquitto broker.
2.Capture ethernet packets to observe the issue.
3.Set up two clients: one as a publisher and the other as a subscriber with manual ACK.
4.Terminate the broker using Ctrl+C and restart it several times.

• Operating System: Ubuntu 22.04 LTS
• Toolchain version: rustc 1.79.0-nightly; mosquitto version 2.0.11

Failure Logs