Webtransport: Timeout after 9s

[dalton-oliveira]

Running the webtransport example I always get a timeout after 9s idle. That doesn't happen when I use the https://echo.webtransport.day endpoint url. So how can I keep the connection alive ?
Pasting here the error log:

ERROR example_webtransport: connection lost

Caused by:
    aborted by peer: the connection is being closed abruptly in the absence of any error: 25:No recent network activity after 9004886us. Timeout:9s, num_active_streams: 2, num_pending_streams: 0, num_outgoing_draining_streams: 0 {0:18602053us;147,0,0,0;33,0}{1:18591736us;0,0,0,0;44,1}
2023-10-26T16:55:15.868982Z ERROR salvo_core::conn::quinn::builder: unable to send response to connection peer error=h3::Error { kind: Write(ConnectionLost(ConnectionClosed(ConnectionClose { error_code: NO_ERROR, frame_type: None, reason: b"25:No recent network activity after 9004886us. Timeout:9s, num_active_streams: 2, num_pending_streams: 0, num_outgoing_draining_streams: 0 {0:18602053us;147,0,0,0;33,0}{1:18591736us;0,0,0,0;44,1}" }))), code: : None }
2023-10-26T16:55:15.869058Z ERROR salvo_core::conn::quinn::builder: unable to send data to connection peer error=h3::Error { kind: NotReady, code: : None }
2023-10-26T17:15:13.977925Z DEBUG Connection{peer=Server}: h2::proto::connection: Connection::poll; IO error error=UnexpectedEof```