Connections increase when publishing at high rate

[merlich9]

Describe the bug

Publishing messages at a high rate, 1-2k messages per 10 minutes, the connections keep increasing. The publisher is not closed/disposed, but reused. The only way to get the connections to close is to restart the process.
Have tried closing/disposing after x publishes, but that only slows down the connection increase slightly, but still has connections dangling. Increasing timeout and heartbeat timeout hasn't had any effect.

Reproduction steps

1. Publish messages at a high rate from a single process with messages between 1k and 1M in size. 1k-2k per 10 minutes.

...

Expected behavior

Connections to stay constant for each connection/channel.

Additional context

No response

[merlich9]

            factory = new ConnectionFactory
            {
                HostName = messageBroker.Host,
                Port = messageBroker.Port,
                UserName = credentials.username,
                Password = credentials.password,
                VirtualHost = messageBroker.VirtualHost,
            };
        connection = await factory.CreateConnectionAsync(Assembly.GetEntryAssembly().GetName().Name, cancellationToken);
        channel = await connection.CreateChannelAsync(cancellationToken: cancellationToken);

props: deliverymode=persistent
await _bus.Channel.BasicPublishAsync(_exchange, routingKey, false, props, messagebytes);
*keep reference to connection/channel, just calling publish. Over time, keep seeing connection count from client increasing in rabbit admin, and only decreases after restarting the process.