Apply Filter on Date Aggregation (3M, 6M, MAT)

I have connected my Power BI Desktop to an SSAS Server (2014). The data model has a date aggregation dimension with the following values (MAT, 3M, 6M, None, YTD). I'd like to create the following visual:

* Rows: Product Category

* Columns: Date Aggregation (3M, 6M, MAT, YTD (basically everything except of None))

* Values: Sales

Additionally I have added a filter on Month (selected on Aug 15).

The visual is shown as expected, but I'm not able to get rid of none. If I apply a filter on the Date Aggregation table (as visual level filter or page level filter ), I can just select one specific date aggregation, but not select several or unselect none.

Also if I add a slicer on Date Aggregation, the slicer selection controls are not shown.

Any ideas why this is not working and what I can do to achieve this. As mentioned, I have set a filter on a specific month, so that shouldn't be the reason.

Thanks,

André