Hi,
I wonder if anyone else has experienced this. It’s happened twice recently on Pro 10.0.15 - I have a small project open (5 audio tracks) and open a modal dialog box - once it was Audio Connections, the other time I think Tempo Detection. Cubase starts playing on it’s own and freezes, none of the transport controls respond - the PC is still responsive, but the modal dialog is hidden (you can see it with Alt-Tab’ but you can’t bring it to the foreground. After a minute or two the program ‘unfreezes’ and responds normally.