New Waypoint via data pages in a320 FMS

Did anyone ever succeed to create a new waypoint in the data index pages of the a320neo? I can hit the buttons but nothing happens. If I put some data (ident, lat/long, place/brg or whatever) in the scratchpad field and hit the left line select keys nothing happens.

Is it a bug or maybe a feature that still has to come? But it would be nice to create additional waypoints to the flightplan that are currently unknown to the fms data base. The Working Title CJ4 works perfect in this resp…