Matrix not affected by visual filter

PBI Desktop Jul 2019 version

It does not appear that the Matrix visual is not impacted by a Visual Filter in the same way other visuals are (table, column/bar, etc).

Here is a simplistic example

My data looks like this:

I create a table with those three columns

Note that Category C has a negative value.

I then apply a filter on Amount

And category C is now filtered out

Convert the same to a Matrix, with Date on the row, Category on the Column and Amount as the value

Note that Category C is visible. Now apply a filter to Amount.

Category C is still there ???

Is this a bug or an unfortunate feature of the matrix visual?

Thanks,

David

ETA: If I move Category to a row under Date, the filter works as expected.