Task Menu displays wrong UI

Steps to reproduce:
1. select an event
2. From Actions (menu not Action column) Start Task
3. On Tasks tab select a workflow. The correct UI is displayed
4. Now select another workflow, the UI from the next menu item is displayed. You can't select the last workflow either.

Expected Results:

The correct workflow UI is shown

Workaround (if any):

Close the action pop-up and reopen, making sure this time you click the correct workflow at the first attempt