Connection closed without calling onClose callback

[NikyAccet53]

After leaving the app opened for a long time, the hub is not recieving incoming signal r messages.
The connection status is still connected and no callback has been called (onclose, onreconnect, onreconnecting)

This is how I created the HubConnection:

final connection = HubConnectionBuilder()
        .withUrl(
            ServiceUtilities.ENDPOINT + URL,
            HttpConnectionOptions(
                logging: (level, message) => print(message),
                accessTokenFactory: () async =>
                    ServiceUtilities.UserLogged!.token))
        .withAutomaticReconnect()
        .build();

    connection.serverTimeoutInMilliseconds = 1000 * 60 * 60 * 24;
    connection.keepAliveIntervalInMilliseconds = 5 * 1000;

    await connection.start();

In debug console i found this:

HttpConnection.stopConnection(Exception: WebSocket closed with status code: 1006 ().) called while in state ConnectionState.connected.
Connection disconnected with error 'Exception: WebSocket closed with status code: 1006 ().'.
(WebSockets transport) socket closed.
HttpConnection.stopConnection(Exception: WebSocket closed with status code: 1006 ().) called while in state ConnectionState.connected.
Connection disconnected with error 'Exception: WebSocket closed with status code: 1006 ().'.
(WebSockets transport) socket closed.
HttpConnection.stopConnection(Exception: WebSocket closed with status code: 1006 ().) called while in state ConnectionState.connected.
Connection disconnected with error 'Exception: WebSocket closed with status code: 1006 ().'.
(WebSockets transport) socket closed.
HttpConnection.stopConnection(Exception: WebSocket closed with status code: 1006 ().) called while in state ConnectionState.connected.
Connection disconnected with error 'Exception: WebSocket closed with status code: 1006 ().'.
RangeError: Maximum call stack size exceeded
dart-sdk/lib/_internal/js_shared/lib/rti.dart 1365:34 _generalAsCheckImplementation
dart-sdk/lib/async/future_impl.dart 421:5 get [_chainSource]
dart-sdk/lib/async/future_impl.dart 462:26 [_addListener]
5467
dart-sdk/lib/async/future_impl.dart 464:17 [_addListener]
dart-sdk/lib/async/future_impl.dart 372:5 catchError
packages/signalr_core/src/http_connection.dart 291:7 [_stopConnection]
packages/signalr_core/src/http_connection.dart 461:28
packages/signalr_core/src/transports/web_socket_transport.dart 132:11 [_close]
packages/signalr_core/src/transports/web_socket_transport.dart 87:9
dart-sdk/lib/async/zone.dart 1582:9 runGuarded
dart-sdk/lib/async/stream_impl.dart 418:7 sendDone
dart-sdk/lib/async/stream_impl.dart 428:7 [_sendDone]
dart-sdk/lib/async/stream_impl.dart 317:7 [_close]
dart-sdk/lib/async/stream_controller.dart 792:5 [_sendDone]
dart-sdk/lib/async/stream_controller.dart 818:7 [_sendDone]
dart-sdk/lib/async/stream_controller.dart 647:7 [_closeUnchecked]
dart-sdk/lib/async/stream_controller.dart 640:5 close
packages/stream_channel/src/guarantee_channel.dart 55:13
dart-sdk/lib/async/zone.dart 1582:9 runGuarded
dart-sdk/lib/async/stream_impl.dart 418:7 sendDone
dart-sdk/lib/async/stream_impl.dart 428:7 [_sendDone]
dart-sdk/lib/async/stream_impl.dart 317:7 [_close]
dart-sdk/lib/async/stream_controller.dart 792:5 [_sendDone]
dart-sdk/lib/async/stream_controller.dart 818:7 [_sendDone]
dart-sdk/lib/async/stream_controller.dart 647:7 [_closeUnchecked]
dart-sdk/lib/async/stream_controller.dart 640:5 close
dart-sdk/lib/async/stream_controller.dart 884:29 close
packages/stream_channel/src/guarantee_channel.dart 188:38 close
packages/web_socket_channel/html.dart 128:25
dart-sdk/lib/async/zone.dart 1661:54 runUnary
dart-sdk/lib/async/future_impl.dart 163:18 handleValue
dart-sdk/lib/async/future_impl.dart 847:44 handleValueCallback
dart-sdk/lib/async/future_impl.dart 876:13 _propagateToListeners
dart-sdk/lib/async/future_impl.dart 643:7 [_complete]
dart-sdk/lib/async/stream_pipe.dart 59:43
dart-sdk/lib/async/zone.dart 1655:54 run
dart-sdk/lib/async/future_impl.dart 206:18 handleWhenComplete
dart-sdk/lib/async/future_impl.dart 817:38 handleWhenCompleteCallback
dart-sdk/lib/async/future_impl.dart 873:11 _propagateToListeners
dart-sdk/lib/async/future_impl.dart 652:5 [_completeWithValue]
dart-sdk/lib/async/future_impl.dart 722:7 callback
dart-sdk/lib/async/schedule_microtask.dart 40:11 _microtaskLoop
dart-sdk/lib/async/schedule_microtask.dart 49:5 _startMicrotaskLoop
dart-sdk/lib/_internal/js_dev_runtime/patch/async_patch.dart 181:7
RangeError: Maximum call stack size exceeded
dart-sdk/lib/_internal/js_shared/lib/rti.dart 1365:34 _generalAsCheckImplementation
dart-sdk/lib/async/future_impl.dart 421:5 get [_chainSource]
dart-sdk/lib/async/future_impl.dart 462:26 [_addListener]