It's probably the first option. I open the Dashboard and click Smart widgets in the menu. At first, the panel is empty. I click the plus sign and the editor opens. I don't do anything there, just exit the editor. After that, if I go to the Smart widgets panel, there's a saved, empty draft there. I don't need it, of course. But there's no way to delete it. The draft is only deleted after logging out of the account. I hope this explanation is better.