Back Key press after a call to GetUserData

Hi,

I'm trying to handle back key presses in my roku app. In general they're fine, but if I press the back button after a call to GetUserData or GetPartialUserData then the application exits.

I'm using the same messagePort as the rest of the application, I do wait for the button select released event before continuing after the call to GetUserData.

Am I missing something here?

Thanks