This defect only applies to the Social View (introduced in SBM 10.1.2), not the Social Widget (the widget introduced in SBM 10.1 that can be added to a custom form). Steps to Repro: 1) Create a workflow that has more than one journal field (Journal1 and Journal2), both set to not required.
Social Widget The Social Widget detail control can be added to custom state forms in SBM Composer. Once you add the Social Widget to a form and deploy the process app, an SBM item in the User Workspace displays the users who have worked on the item.