Hallo, by accident I have found out that if you're woking on a page in detached mode which has some master applied to it, and then you DELETE that certain master while staying it detached more, the orange bar on top alerting you that you're editing in detached mode will never go away, even if you click of "finish" (that button just stops working whatsoever). I guess it would be logical if that bar disappeared as soon as you delete that master.