Double chest with NBT data glitching

When you get a chest with NBT data (+DATA) and try to make a double chest it shows as two chests when opening left or right chest only left one opens and it shows up as a single chest in the Ui and you cant grab items from it

 

To reproduce: get a chest with data (Ctrl+middle mouse button) and place 2 in the formation of a double chest 

What I expect to happen: a double chest with the items of both chest that allows me to grab items and put them in 

What actually happens: a 2 chest where the left one opens if you try and open either one and that has the UI of a normal chest and you cant take items from

Video: Link