We use that map a lot in the CT and we're unfortunately very familiar with it over there. Its easy to avoid, if you go directly to the arena with that map, there is no problem, but you cant go to any other arena and then enter that map. Its not a huge hassle if you know about it ahead of time, but if you dont know about it, it can be very confusing.
I saw that you are going to change the map, but as long as everyone knows not to come from another arena first, you can still use it.