In an area where monsters will pop up out of the ground such as worms or when approaching a gate to seal in a monolith, target the ground where a monster will spawn (but is not currently visible) and lunge. Note, this is not monsters that will spawn later when you activate the gate, but monsters that are “hiding” and will appear when you approach, but before clicking the gate.
Consistently, this will cause the lunge bug for me on my paladin causing my character to freeze in the lunge animation, as if stunned, preventing me from moving with left click, until I cast a different spell.
Additional information:
PC game version
Online character
I do not have the “additional charges for lunge” talent.