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."
Expected result: the selected dashboard was removed, the current workflow execution is proceeding and its dashboard is shown.
Actual result: the workflow execution is proceeding, but the current dashboard is removed.