I've noticed that the sync goes completely wonky when set to auto and connected via USB to a PC that's gone to sleep/standby. Instead of handing sync over to the MIDI DIN device, it seems to continue to rely at least partly on the USB (transport via DIN still works, but timing is severely disrupted). Stopping and restarting playback doesn't work, and neither does resetting the KSP. Playback is normal once PC is awake.
