Hi all I'm Taiwanese, my english is poor , but I will do my best describes the problem https://jsfiddle.net/p7zbawt3/ I've added that code: this.game.stage.disableVisibilityChange = true;and this.config.forceSetTimeOut = true;When the browser tab loses focus,the tween animation can keep running,but the Physics ARCADE no works with loops, It was paused... Hope that helps, thanks!