To reproduce the issue:
1) Make sure to have several dashboards for different workflows runs.
2) Run a workflow, e.g. I ran "Variation annotation with SnpEff" with the tutorial data.
3) During the workflow run open the "Dashboard Manager", select one of the several dashboard, and click "Remove selected."
the selected dashboard was removed, the current workflow execution is proceeding and its dashboard is shown.
the workflow execution is proceeding, but the current dashboard is removed.