Can't hear MIDI notes when editing in lower window: Cubase 15 Pro

Hi. Got a strange one here!

I’ve carried across a Groove Agent fill pattern into my project and it all works fine, except I can’t hear any of the individual sounds when trying to move them for editing purposes in the lower (editing) window. They are perfectly audible when playing the whole project, and I can also hear all the drum sounds together when I solo them in the lower window and play. As well as that, all the note sound if selected with the mouse on the left-hand keyboard of the lower window. It is only within the editing window itself on the grid where the individual midi notes themselves won’t sound if I click on them or move them.

Any thoughts would be very gratefully received.

Thanks.

Cubase 15 Pro (version 15.0.30)

Hi,

Is the Feedback audition enabled in the Editor?

Of course, Martin. Thanks very much indeed. The more I learn about Cubase, the more I forget! Thanks for your help.