Last night the left-hand Play / Pause button on my S4 Mk3 stopped working. I've reinstalled Traktor Pro 4 (in Windows 11), uninstalled and reinstalled the Asio driver, and done a full reset of the S4 from within the Traktor preferences. It works in all ways, i.e. lights up dim when a track is loaded and bright when a track is playing, so hasn't been disconnected inside the S4, but when I press on it, ut won't play the loaded track. I can only play and pause the track by clicking on the button in the Traktor software. What can I do to fix this? Thanks.