Structure-box detecting

Hey MCreator Dev,

Currently Minecraft detects the selected box of a structures that has being saved as one structure. So what that means is that for example if someone selects the block where the structure should spawn on, Minecraft detects the whole scale (left to right) and places it. The problem now is that if the corner (part of the saved structure) touches that specific block and not the rest of the structure, the structure is getting spawned. = the structure basically flies.
It would be a great addition if Minecraft only detects "real" blocks of the structure and not air or structure_void blocks. 
For example: If you want to spawn a tree (you have a stam/wood and a few leaves) it should only detect the bottom wood block of that structure and not the void block next to it.