Typing a number too soon after bringing up the emote screen causes the game to crash. Likelihood increases the sooner you input the number.

I setup a macro that hit B and a number to allow me to instantly trigger an emote, however any time span under half a second from opening the menu is guaranteed to crash, and half a second after sometimes crashes.

In theory this means the crash window is wide enough for faster players to hit while trying to emote quickly, causing them to instantly crash upon pressing a number.