It's FPS (frames per second) lag, not STS's side if you are in elite and have a large group or anything around you causing your processor in your device to really have to work you either get PING lag (i.e. you freeze, gets choppy etc) or you get fps lag (everything still works, but pixelation wire boxes etc.) Or sometimes you get a combination of the two.

Either way its not the server/STS. Make sure you turn off all backround apps or anything else running that could take any your processor's power away from AL.

Hope this helps