Bug? - Escape doesn't close the top window

The escape key is not closing whatever window is on top. The old client did it right, the unity client does not.

Example:
Let's say you just logged in. You collect your rewards, go to join a match. A popup shows up with a daily offer. You look at it, you're not interested, so you hit escape.

Current (incorrect) behavior: The daily offer window stays up, but the match you were setting up closes. If you hit escape again, the event you were in is closed too.

Previous (correct) behavior: The escape key closes the topmost window (in this case, the offer), and the lower layer windows remain open (in this case, the match you were setting up).