Indeed I can confirm that in Chrome 33, when you execute the capx, press the up key arrow then the enter key, then you have to press the up arrow two times in a row for a new alert box to appear.
I doubt it's anything related to C2 and is most likely an issue on Chrome's end since it works as intended and directly in FireFox.
Ashley might have a look at this at some point, it's not a critical issue anyway and for now he's focusing on the beta development of multiplayer which is a big piece.