MessageLayer HitTestAsync does not return null

Discussion created by aquaseal on May 17, 2013
Looking at the documentation for the HitTestAsync method on the MessageLayer it states "If no Message was hit, null will be passed to the callback".

I am receiving a non-null message that has 0 items in it in my callback when I click on the message layer but not on a message. Is this a bug or is the documentation incorrect?