usually disengaging is >.>
As for the patch, I think it only applies to untouched mobs.
IE: You're fighting a mob and do a AoE weaponskill cause you think the area is clear... Sadly, you catch one mob in the AoE and just can't get to it yet. Before the patch, a player could run up and range attack the link, claim it and run away leaving the mob claimed and attacking you. Meanwhile, you've finished off your mob and are being pelted by someone else's and you can't do anything but cure (which draws more hate). Now, if that player uses range attack but misses, or does not do enough damage to get the mobs hate off of you, then the mob will not go claimed so you can still fight it if it's there pelting on you.
You should not loose claims of mobs you're fighting because someone steals hate.