I'm using Safari. I just typed "X site," and as you can see, it doesn't display that text. On a second try, it actually will display what I typed after I press enter, but not until then. I can progress, though, although this isn't optimal.
Indeed that definitely isn't optimal. I don't have a Mac, so this is difficult to fix at the moment, but I can borrow one after the long weekend and try to resolve this.