Blue ocean: While adding downstream build job using my multibranch pipeline, there is an option for parameters but it says This property type is not supported.
I think it is better to add some kind of link that says why it's not supported. I tried adding a parameter in the script but that didn't work either.
My downstream job is using BuildWithParameter plugin where I already set it up my variable unable to receive it from upstream.

upstream multi-branch pipeline script : 

stage('isHotfix') {
 steps {
 build(job: 'some-freestyle-downstream-job', parameters: [string(name: 'PARAM_BRANCH_NAME', value: "my_string")], wait: true)
 }
 }

Maybe it is related to this: https://issues.jenkins-ci.org/browse/JENKINS-36855