This is very strange, at first I thought it was me fiddling around that did something silly, but this has now happened three times in the past 24 hours.
The MIDI editor simply stops receiving the Up/Down input from the keyboard, even though it has focus. Instead Cubase decides to send the Up or Down key command to the main panel:
I select a note in the MIDI editor, I press ctrl+left and the note moves left (just to check it has focus), but when I press up - instead of moving the note up one semitone, it moves the track selection in the main window.
Restarting Cubase fixes it. But this is annoying, anyone know what’s going on?