Hello. This bug has been there for less than a month. Indeed a very strange phenomenon and even more strange answer from a Cipsoft employee. As of today, the bug has most likely been fixed. This place is no longer in a protection zone.
Personally, I think it was simply a bug and not some mystery to be solved. Cipsoft employee’s answer can be explained by not understanding the question or poor knowledge of game mechanics. However, this statement is very interesting 🙂