4 active connections from one winbox

Hello, i have a small issue, when i connect to mikrotik using Winbox i get 4 active connections at same time ( winbox + 3xtelnet )
Tried to log in from different computers, same result.
Tried to log in with other user from same group and i get just one - winbox connection.

This thing started just few days ago.. can someone explain why?

Are you opening the terminal windows in the winbox also? These are the telnet sessions.