Had two stacked double chests

I broke my bottom double chests and the double one I have above it i am now able to walk inside the chest as if it weren't there. I can still use the chest. I just replicated it as of this moment.. 

 

To replicate place a double chests and then place another double chests on top of the first one. Then break both bottom chests and you should be able to completley walk through the floating double chests