Since the latest beta, headset clicks do not work as expected. One click still pauses, two clicks sometimes skip by one or two tracks, three clicks at best return to the start of the current track, but never to the previous track. It looks like three clicks are interpreted as two clicks first (skip to next track) and then as three clicks (go back to previous track, which was the one currently played).
In the logs I clicked around a lot and also switched to slow click recognition in the settings, which made things even worse.
Issue occured on two different (Samsung) devices.