This one has me foxed. I'm guessing a driver issue, but what do you think? Cubase 10 - tried and tested interface (a Tascam 1641 on the latest driver - worked perfectly with Cubase Pro 9.5 and below. Latency values are pretty good - never an issue, and they have not changed in the various displays - but sometimes, the audio lags behind the screen by maybe two seconds - fader adjustments take the same time, so there's just a huge lag between when the screen says is happening and actually hearing it. If I power down the interface and power up again, normal operation is restored but after any period of inactivity, the long delay re-appears. Never did it until a few days back - maybe a week? Had 10 running fine for quite a while now. I'm going to re-download the driver, just in case - but it seems a bit weird! Very annoying pressing stop and the music carries on for a couple of seconds.