Parallel execution of same job N times with different parameters leads to only 1 execution of the job

pipeline {
    agent none
    stages {
        stage('Processing projects') {
            steps {
                script {
                    def projects = ['project0', 'project1', 'project2', 'project3', 'project4']
                    def projectsBuilds = [:]

                    def labelParameters
                    for (project in projects) {
                        //JENKINS-55426 need to save iterated variable value into intermediate variable, otherwise there will be last value from collection for all jobs
                        def currentProject = project
                        labelParameters = []
                        labelParameters.add([$class: 'LabelParameterValue', name: 'node', label: 'linux'])
                        labelParameters.add([$class: "StringParameterValue", name: "PROJECT_NAME", value: currentProject])

                        projectsBuilds[currentProject] = {
                            stage(String.format('%s execution', currentProject)) {
                                build job: 'Sample-Job', parameters: labelParameters
                            }
                        }
                    }

                    parallel projectsBuilds;
                }
            }
        }
    }
}