I wasn’t able to replicate the issue either in my Win8 environment, but I did come across a couple posts that worked for some people with a similar issue.
I also found a another post where pressing Escape returned the functionality, but since you can do it with other applications, this one is probably not as likely to be your problem.
“I had the same problem, tried closing anything related to mouse input down (Logitech software, mouse without boarders). Eventually found the solution in a forum post about windows 7. It has something to do with another application locking the function out. Anyway, hitting escape seems to return the functionality back for me. Try it and let us know if it solves your issue.”