Sundering Leap, the berserker skill:
a) does not respond positively with autotargeting.. eg., it doesn’t target anything when autotargeting is on.
b) does not respond positively by placing the target zone upon the target when a target is selected. e.g., if you click on the skill will your mouse, or press the number key, you will always make a hop in place, or leap at the mouse, regardless of your snapping settings of the ground target.
This means you have to manually walk to your enemy, leap in place, in order for the skill to work.
TLDR:
If you click the skill button, you leap in place, regardless of having a target.
If you click the number of the set button, you leap at the mouse, regardless of having a target.
This makes the skill unusable in combat