I just recently took my 2017 DS into the dealer to get the phase 4 update of the Infotainment system. I am currently have issues with the media library and SiriusXM playback being choppy and sometimes cutting out for up to a second. It was fine before the update. I want to determine if it is a software problem (which I suspect) or the dealer didn't not put things back together properly. The touch is much more responsive but it seems that switching through menus can effect the audio playback as well.