Hello sipx,

this is correct, on screen widths < 479px, the dropdown filters are automatically hidden, since it has proven to be very hard to use them on small resolutions, especially if there are many main filters.

If you want to display the filters always, you can try to add a display: block !important; to the class drop_down , e.g. in the css file belonging to the respective portfolio, or in your template's css file.