View cue / open cue bug?

This could be problematic:
Hog PC v3.2.0
Bug seems to have developed in my show whereby opening or viewing a cue opens the view cue window as normal, but it closes a second or so later. Have tried on another computer (no screens, keyboards etc) but this still happens
I am hoping when I load the show into a Hog 4 in Rio tomorrow it will be OK on that platform, but in case it doesn't, please help me!! Anyone else experienced this, or can tell me if the show loads on a 'real' desk?
Thanks all,
Theo