So. Me and some people are testing out mods. Now the Map Antartica and Homing Pigeon.

Now I see, that every Flyer I send to a friend will only hang in the ceiling of the map. It ist no matter where I stand and send the Bird nor where the flag/mailbox is. They try to move higher and can't. Now I want to know, if there is any possible way to lower the hight they fly?