Powered rails cached state

By creating a 10+ blocks like of powered rails and putting a lever at one end, and powering the opposite end with a button( you should power the first rail the lever wouldn't power), then after everything is unpowered you turn on the lever and all the rails turn on, even if they are more than 9 blocks away, it seems like they visually turned on before but remembered the on state caused by the button. When placing/updating a block near rails they turn off and when placing/updating a block near the lever they turn on again