Shoutbox

i know this sounds kinda stupid, but its just bugging me, it locks every time i try to change my typing language
so can anyone here tell me how to disable this feature or how to change the combination?

Open Plus Preferences, then navigate to the "Messenger" tab, then click "Messenger Lock" on the menu on the left.

Uncheck the box next to "Activate Messenger Lock with a system wide shortcut" or simply change the shortcut