Quote Originally Posted by Iscah View Post
Is lock-on something separate to regular hard targeting? Does the inability to enter the ring only happen in combination with other settings? I've never known that to be a problem, and I would think more people would run into it (pun not intended) particularly while dodging donut AOEs.
Lock-on is a third layer of targeting that either applies automatically when you press the auto attack button or activate any offensive action that coerces auto attacks (see the setting Jeeqbit points out above) or manually if you press the lock-on keybind (default numpad5 I think) or use the /lockon command. It prevents you from entering the target's hit circle, and this is ostensibly to prevent you from going into and all the way through the target, which could potentially cause some unaesthetic or disorienting rapid reversals of the camera if you held Forward as you crossed the target's center, turned around, crossed the target's center, turned around.

In re: donuts, it's probably not so obviously an issue because the majority of donuts are larger than the target's circle, even when the animation appears to touch the circle or even slightly into it.