Problem
Unable to re-run branch job when there is other running job from same branch waiting for user input.

Possible solution
User could always jump to the activity and fire off the run for the branch from there. Would need JENKINS-42451 to be completed.

Usecase
Pipeline allows user to vote if branch build shoud be deployed to server.

Voting is preformed through input step which pauses running pipeline job. In this case the blueocean does not show run button which fires another pipeline job from same branch.

Screenshot