Ah, it's a bug, normally shorcuts are disabled during export... What kind of export did you do?
That said, shortcuts are enabled even you don't have focus on app, maybe that's what you are talking?
I do this because when I used this tool, I did "Ctrl S" always even when I changed something on my browser... So I made this choice and let the possibility to disabled shorcuts on Edit menu... I don't sure it's the right choice, I wait feedback and will try to polish the shorcuts controls...