I trashed my prefs about two weeks ago, and have these issues ever since.
So far it has only been one specific project, but that’s the only project I’ve been using during that time. As soon as I get a chance, I’ll try testing in a clean project.
I only have one MIDI controller, so all MIDI channels default to that MIDI input. Disabling midi input on individual tracks before moving to other tracks to record may indicate where the issue is (possibly) but is not workable on a session by session basis.
I expect there’s some kind of corruption in this project, or perhaps my template is too large and causing Cubase issues for that reason. If so, I’ll have to mess around with a new template, re-importing tracks etc.
Thanks for everyone’s input.