Sonar Quality Gate behavior in Jenkins pipeline is unstable

SonarQube
,
3

so what you’re actually saying, that my webhook is not really working? what’s wrong with below configuration:
name: jenkins_care
URL: http://XXXXX:YYYY/sonarqube-webhook/

Adding some more details:
Version: 6.7.1 (build 35068)
I’m not using Sonarqube stages within parallel { … }
Trigger command in bitbucket file:

    stage('Sonar Quality Gate') {
        sleep 180
        timeout(time: 25, unit: 'MINUTES') {
            def qg = waitForQualityGate()
                    if (!(qg.status == 'OK' || qg.status == 'WARN')) {
                        error "Pipeline aborted due to quality gate failure: ${qg.status}"
                    }
        }
    }