This is a rather late response to your post, sorry about that.
I've downloaded the project and tried it using 2.1.23 on all major browsers (latest versions AFAIK), and could not recreate the issue you reported.
If you're still having this problem, please retry clearing your browser cache first.
If the problem persists, I suggest you download and import the project you've attached to verify it does indeed demonstrate the issue, and if it does, please provide more information on your environment, particularly details of the browser(s)/version(s) you're using.
For best results, use the Firefox browser..