Currently when PRs trigger off a ATH run - this fails due to:

"No CI build for Blue Ocean branch named 'bug/JENKINS-39295-expandable-path-icon', or doesn't have a pre-assembled plugin tar. Trying the 'master' build instead."

eg: https://ci.blueocean.io/job/ATH-Jenkinsfile/job/master/224/console

If you run the branch build from the branch source it will work.
Currently this actually slows things down as it kicks off a build that never seems to work and takes up resources.

Could this be changed to build from branch source ?