If you add a Slicer to a report, it has a Visual level filter option under the Filters menu. However, dragging something into this field does nothing, even though it tells the user to "Drag data fields here". I understand if visual level filters are not supported on slicers by design, but the fact that the option is being displayed leads to a confusing interface.
I am aware this has been discussed here, but the solution presented is also an issue. The accepted solution is to change the visual into a bar chart, add the filter, and switch back into a slicer. This will apply the filter, but will not visually add the field under the Visual level filter (i.e. the Visual Level filters will still have the "Drag data fields here" label below it). This lack of visibility could lead to confusion with the user, as data could be missing without any sort of visual indicator that this is the case.
