Why my log messages always have the top level operation name?

When logging from the inner scope of a nested operation the log message has the "Operation Name" set to the top-level operation

using (IOperationHolder<RequestTelemetry> topHolder = telemetryClient.StartOperation<RequestTelemetry>("TopOperation1"))
    {
        //telemetryClient.TrackTrace("top holder log 111");
        logger.LogWarning("top holder log 1");
    
        using (IOperationHolder<RequestTelemetry> innerHolder = telemetryClient.StartOperation<RequestTelemetry>("InnerOperation1"))
        {
            //telemetryClient.TrackTrace("inner holder log 1 111");
            logger.LogWarning("inner holder log 1");
        }
    }