Installed Cakewalk by Bandlab the other week and have only ran it a handful of times.  However I lost the use of my keyboard twice.  I haven't had a chance to really sit down and trace this out but it appears that by going to measure by hitting G (then enter the bar number),then pressing the space bar to play causes it to not function.  Everything else seems to function (I can use the mouse to play/stop etc.)   So I opened Notepad to see if the keyboard quit and no it didn't, I can type until my eyes fall out.
 
Closing and restarting fixes it.
 
I had my old X2 projects open both times -not sure if that's a help?  There weren't any 3rd party plug either just the PC 76 and Console em.