Another plant IDed

An earlier post showed a succulent plant that i did not know the name of. It has now been identified as the Flaming Katy (kalanchoe blossfeldiana). Through the course of the year, this plant lost all its leaves, stood bare for a while, then started sprouting tiny new leaves that grew well. I think it is going through this cycle once again and im still trying to figure out why. too much sun? too much water? too little of either?