Used Hydrocraft to alter doorknobs to match key, but could be done in vanilla if you have the key to a house and salvage the doorknobs from the doors. I built a vanilla wooden double door and had the option to lock it, which I did. The double door was properly locked and made the locked door sound when trying to open it without the proper key. However, after unlocking and opening the double door, and then closing it again, the option to lock the door completely disappeared. Anyone experience this in vanilla as well? Solutions? I've seen people start to leave furniture behind the door to block it but you cannot do that with doors in certain orientations because that affects which direction the double doors open up.