Weird collision box behaviour if i run 2 instance of my game

i create game object with collision box and destroy - all work fine. But if irun 2 instance of game ctrl +b or html5 i have weird behaviour. one of colision box in go not destroeyd. its very strange ((

upd. problem exist on 1.9.7.0
1.7.0.0 work fine

in single instance work normal. my game is online and use websocket (((