You know you all are posting on a thread from the last time that says "Fixed" in the title, so no one from Inno is going to look at this. One of you needs to start a new bug thread.
But aside from that, the one or two times this happened to me in the past few years, all I had to do was fully close my browser, not just the game tab, and when I started the browser again, the problem was gone. And depending on browser, you may have to clear your cache also.