Play preview animation shortcut doesn't work

Hi, just a minor thing: I’ve noticed recently that when I hit shift+enter the play preview button turns blue but doesn’t change to stop button and animation is not playing in preview window as expected.
To test it I restarted aseprite and changed shortcut to something else few times, which gave me same results.
Note: when I click on play preview button, or press enter everything works fine.
I’m running on win7.