When the bottom block of a door is placed it does NOT attempt to create the top block. A separate command is required to spawn the top half of the door. It is possible that the bottom portion of the iron door is deleted and the top remains, causing the wooden and iron doors to attempt to merge.
Wayde Hutchings
When the bottom block of a door is placed it does NOT attempt to create the top block. A separate command is required to spawn the top half of the door. It is possible that the bottom portion of the iron door is deleted and the top remains, causing the wooden and iron doors to attempt to merge.