This might not have been the case with you, but I found that even though there's a dark layer over the screen, you can still click the buttons underneath. So for example, if you click on "Your Results", this screen shows up. Then click on "Your Results" again, the screen gets a little darker because another layer shows up on top. If you now click on the "X", the screen gets a little lighter because the top layer was closed, but you then have to click on the "X" again to close the second layer and fully exit the results. Maybe you had multiple layers open and you just needed to click "X" a few more times to exit the screen?
Either way, I would say being able to open multiple layers of the same screen is an issue too.