Recently I find out that each map in game has a capacity of a certain number of monster's
On the map I was trying this , the number was 21
What it mean? : that mean if in any side of map someone spawn 21 weak mobs and keep them bussy, in fact indirectly he blocked all spawns for players on that map without getting punished and no one even know who did it

Please increase that number or put a separate limitation for each spawn spot's
(I didn't know post it here or new ideas)