Typing nothing at all other than /shout produces a "The command /shout was used incorrectly" error. This only happens while shouting. Works for say/yell/linkshell/etc.

Typing in something will shout my message as normal then change the default back to whatever I was using prior to shouting. Again, this only happens while shouting.

Clicking on the speech bubble icon next to my text entry section and selecting shout from there produces the same error, as soon as I hit enter it defaults back to whatever I was doing before shouting.