Can't write some letters

Hello,
after the patch Defenders of Eorzea (on july 8) , I can not write the letter "a" only as big "A", I am pressing the button, and nothing happens. Anyone got any idea, why that could be? I checked ingame settings, and didn't find anything related. I am from PC, and checked windows settings too, and didn't find anything abnormal (win7). I use hungarian keyboard, but that wasn't a problem before patch, and of course "a" is an international letter...
Anyone could help me with this problem? It is really annoying, because I can't write properly, and can't use emotes, only from the menu.
Thank you for reading this.