[Nomy]

Just a further point of interest:

I recorded a simple single beat over a bar. It took me several stop/starts of the transport to get the problem to surface, but eventually it did. What I can clearly say now is that when the problem is apparent, it will delay when I add a beat on top of an existing beat. If I add a beat in space, it sounds fine! But as I say, this is intermittent.

Maybe this has nothing to do with Cubase, and is some kind of issue with the keyboard. Hmm...