This was happening in MB and is still happening. From my observation generally everythink can be send to someone else, from messages to opening/not opening windows and such. Does that mean, that the person who was supposed to receive message, doesnt receive it because it was redirected to someone else? Maybe some messages are duplicated?
I have also saw that sometimes messages are lost so the other person and you dont know that some message was sent and lost. It may create very big misunderstood sometimes

And some nice example: (no, I\'m not GM)
Once it happen it needs relogging so that it will go back to norm.
