Game Mechanics: Mobs losing aggro after a certain amount of time?

[Ooloo]

I'm not sure if this is a bug or if it's intended behavior, but I've never seen it before in all my years playing here.

While camping the goblin gazugi ring, I will often pull the placeholder off to the side and root him if I need to afk for a bit since the PH respawns are only 30 seconds apart and I don't want to lose track of the PH (people who have done this camp will know what I mean).

Even if root wears off, the mobs are all such low level that I know I'll be safe just standing there while it beats on me until I make it back to the computer.

Today though I noticed that if the mob stands there beating me for long enough, it eventually just seems to give up and it de-aggros and just starts wandering away as if I had never engaged it. I tested this behavior and it's definitely happening. I had always thought a mob that is aggroed on you will never lose aggro unless you run far enough away and it leashes.

Sadly at the goblin ring camp, when this happens it means the mob mixes back into the pack of mobs in that field and I have to go hunting for the PH again.