Confirmed the duplication still happens in [2.0.12]

On Fulgora I was placing an Uncommon Electromagnetic Plant on top of existing Normal one with a recipe of an uncommon lightning collector, when I noticed I had more Electrolyte in my system afterwards than I had before. I disconnected this machine from the rest of fluid network and placed a storage ...

Are those boxes supposed to have those massive amount of supplies? I'm quite shocked to see the numbers of stuff I found in them. 640 belts, 448 inserters, 192 fast inserters, 192 smart inserters, 128 fast belts, and 64 long armed inserters in the first box outside spawn? That seems a bit excessive....