I have been decorating cookies for a couple years and for the second time royal icing that I flooded and let dry on cookies has just slipped off the cookie. The icing had been dry and stuck on the cookies for several days and only today when I moved them, all the icing just came off like one big icing transfer. The icing is the same recipe (made with meringue powder) that I always use. The only thing different is that each time this has happened the cookies are made with either honey or a low calorie sweetener and not real sugar. Does anyone know what is happening? Is there a reaction happening from the non-sugar cookies and icing that is causing this?