Reply to Kontrol S4 suddenly stops playback

Hi,

when I use my S4 with Traktor it randomly works or not, when it does not, the playback stops (play button do nothing) and jog wheels do nothing, though pretty much everything else on the controller still work with Traktor (e.g. effects, gain, song search etc.). I can be playing for twenty minutes when it suddenly stops the song and freezes (playback and some buttons). I use the S4 built in soundcard as the audio device and my laptop is a Dell XPS 15 (which by far exceeds the system requirements).

I have tried to disable other sound devices, reinstalled drivers, restarted everything, disable wireless and other unnecessary software, increase buffer length, disabled power management (in particular USB power management) but the problem persists. In the Traktor Kontrol Control Panel it says 'No streaming possible. Please try to disconnect and reconnect the device or reboot your computer'

Grateful for any input!