Warrior stops fighting when mob is at low health

[fourier]

This issue happens when multiple mobs are pulled. I #bot group order attack mob1 for the warrior to kill, but it seems if mob2, etc. attacks another bot (ie cleric) sometime throughout the fight, then the tank will stop meleeing the original mob once it has around 5% health left (running away) and go attack mob2. Additional #bot group order attack <mob1> requests do not cause the tank to leave mob2 and go back to mob1.

Has anyone else seen this happen? Is this considered a bug or a feature?

By the way, I'm not sure if the non-warrior bots in the group being on the hatelist of various mobs other than the currently tanked mob has anything to do with the problem.