We notice that all the Grid Layouts in the Modern UX can only have 10 fields that can be filtered upon at any one time. When we try to add more filters, the "Add Filter" button greys out, and a message "10 filters maximum" appears. Is this expected?
This is an expected behaviour of the product. Only 10 fields can be used as filters at once. If a 11th field has to be filtered upon, one of the existing fields would have to be removed.