When I have an unread combat report and when I open the messages (esiponage in default) the unread number next to fleet is dissapear. But actually i have to switch to combat reports to not get back the unred message.

You can see in the other one. When I did a fast printscreen you can see a a number 2 in Fleets and on the first when the page is loaded it's nt there but under the Combat reports and Other has 1-1 unred message.