This should be filed under URGENT.
Until someone with more expertise responds, the best I can do is:
Itis whatever TF it is!
No expertise needed. It's a beta state game - bugs and glitches are there. Just report them with descriptive words as accurate as possible and they'll get fixed.
@rover there are many other bugs which break the game much more than this tbh, but ppl who report those bugs don't put the clickbaity-est title they can think of... it's probably more helpful to the developers if a short description of the problem is in the title.
lol yeah I discovered this too. There's another pair of boxes outside the middle entrance of the double story building in the middle of the map that look just like these ones.
You can go prone inside them and basically be invisible and shoot the enemy. It's hilarious.