'Confirm Archive' message gets stuck on Freeform Visual Task Board (VTB)DescriptionIf you open a task in a Freeform Visual Task Board (VTB) and press the 'Archive' button you see the 'Confirm Archive' popup.If you then close the task form to return to the VTB, either by clicking on the VTB in the background or choosing 'X' on the form, whilst the 'Confirm Archive' popup is still displayed it returns you to the VTB.If you then repeat this a second time, upon opening the task for a third time you will see the 'Confirm Archive' popup still displaying.You cannot close it, pressing 'Cancel' does nothing.Steps to Reproduce 1. Connect to an instance that has Visual Task Boards enabled.2. Navigate to 'Visual Task Boards'.3. Create a new Freeform board.4. Press '+ Add Card' in one of the columns to create a new task.5. Click on the newly created task to display the task form.6. Press 'Archive' > the 'Confirm Archive' popup displays.7. Either click on the VTB in background or close with 'X' on the form.8. Repeat steps 5-7.9. Click on the task for a third time, the 'Confirm Archive' popup is still displaying but shouldn't be.WorkaroundThe only workaround is to refresh the VTB itself.Related Problem: PRB1383122