Try and test this yourselves, I have close friends in the same ally and it's happened everytime. IF you have any heroes refreshing (arena, etc) and an ally mate refreshes your hero the signal is SENT ASAP during game play which causes a buttload of lag. I don't recall any updates stating they changed the system where prior it was that the signal would be before the fight and after it ended. Maybe they did this to prevent modders/hackers but it's screwing the rest of us who arena and the refreshes lag the hell out of our games. Tried it on Android and Iphone (Multiple devices, on wifi, off wifi) and it's always the same. As soon as someone is refreshing your heroes the LAG starts. If you do the "refresh" individually it makes it less laggy but still lags the game. Those who use "Help 4" will lag the **** out of you lol. Please test and spread the word. They need to fix this ****.