I have this issue in my survival, normal difficulty world and my house is above water. It is built on wood slabs. (I am listing this because I know mobs are buggy on slabs above water and air) I try to sleep and it gives me the you cannot sleep message. I had to move my bed upstairs to sleep. I checked that there were no phantoms or mobs underneath/by my house. I waited until the next day and it happens again. Plz fix soon.