When I used Wes and battle beefalo fo fight with dragonfly, I found it's hatred is very easily to lose.
I did not use any server mod and just few of but common client mods, even I turn off all the mod, this bug is still exsit.
I think maybe it is relevant to BATTLE TIME, because when I used someone with higher atk or buffed food, the battle is going to be normal.
I am very sure I was not far away from DF's spawn place, you can look the images, the battle field was very closed to the spawn.
1. ride a battle beefalo.
2. do not eat any hot seasoned food and volt jelly, make sure the atk is just be normal.