Messages stacking up without distinction

The message informing the user when a request was not accepted stays in the message area after another, subsequent, request was rejected thus issuing another message.

This goes on and on, and since there is no other detail than 'Request Rejected' this information has very little meaning in such a specific use case.

STEPS

%BEGIN_LOOP%

• as 'author' request a publication
• as 'admin' reject the publication
  %END_LOOP%

I did five iterations and I have attached a screenshot of the resulting accumulated messages.