Mahum mobs

Many times when i go to farm in Mahum , the mobs don't react as a clan , and only the ones i hit follow me when i try to make a train.
Sometimes it takes up to 10-15 minutes till they start to act properly and all mobs from the same pack start to follow me when i hit 1 of them.
Please take a look and fix it. It's very frustrating to make trains as a spoiler when that happens.
Thank you.