When I looked at history of the buildings they were properly connected to each other and not overlapping.
https://rene78.github.io/latest-changes/#17/45.80093/15.94087
https://www.openstreetmap.org/way/160226175/history

I was also mapping around this area recently and I would have noticed something is wrong.

In conclusion, errors shouldn't have triggered, it's obviously a bug. In the meantime, you should just watch out for this sort of stuff.

Želim ti svu sreću kod dobivanja državljanstva! 😊