!!!!!!Open lesson for QA

Steps to reproduce:
1) download the game
2) open the game
3) start a new game.
4) click on the "new game" button
5) click on the "new game" button a second time

expected result: New game should be started immediately after clicking on the new game button.
actual result: New game button is stuck after clicking a few times one by one.

Note: Sometimes button is a stack from the first click and sometimes after the second or third click.