We would like to reference a step inside a parallel task of a Jenkins workflow. But it seems that step IDs are created non deterministic for steps in multiple parallel tasks. Fo
Perhaps you want to use the input ID instead of step ID:
node { input id: 'input1', message: 'Continue?' }
Then the input URL would exposed as:
http://[jenkins_base_URL]/job/[job_name]/[build_id]/input/Input1/proceedEmpty
(Note the capitalization on the input ID).