Reappearance of Actions Sets deleted via the ‘Manage Action Sets’ screen:

Reappearance of Actions Sets deleted via the ‘Manage Action Sets’ screen:
Dear IB Team, I sometimes find that Action Sets deleted (using the red X, then ‘Apply’) in the ‘Manage Action Sets’ screen don’t always appear as having been deleted when I return to view via the ‘Action’ tab in the ‘Props/Action/Info’ Info’ panel. I am using IB version 3.3.3 Build 325
Many thanks