in Pipeline view that is created under folder:

dslFactory.buildPipelineView(folderName + "/" + branchName.replaceAll('/', '_') + '_pipeline') {...}

the description of pipeline view is being displayed twice - seems to be treated as a description of folder. Folder description is missing though, it is visible at main folder page, with a system message, as mentioned in https://issues.jenkins-ci.org/browse/JENKINS-34539