TLDR: Video example of lunge bug, with examples of how to recreate it.
When trying to lunge, occasionally the character gets locked in the lunge animation and does not move, and is unable to be broken out by most actions (clicking to move, potions, any action that does not have an animation like volatile reversal, another lunge cast) Actions that make a player animation (hammer throw, anomaly, javelin, cleave, auto attack, rive etc) all have animations and will break the player out of the stuck state. There is no time limit, lunge will stay stuck indefinitely until the player causes another animation.
Scenarios where lunge can get bugged:
-Around a shrine with items on the ground (this specific shrine was shrine of rare scorpions)
-When an enemy is partially around half-cover (fences, rocks, things characters cant move through but can see through)
-When an enemy is entirely behind soft cover (fences, rocks, things characters cant move through but can see through)
-When an enemy is partially around hard cover (buildings, chasms, things the character cant move through)
-When an enemy is partially around “extra hard cover” (random rocks, buildings, and walls that delete projectiles when they touch them, projectiles cannot move through them etc.)
-When an enemy behind a shrine
-When lunge targets destructible environment elements (boxes, piles of wood, breakables)
-When lunge targets an enemy near, behind, or partially behind breakables (boxes, piles of wood etc)
You can see this in the first 5 minutes of creating a sentinel, casting lunge at boxes around the starting forest. Traveling a bit further to the bridge area will let you see the many ways it incorrectly interacts with enemies. Would not recommend using lunge on any hardcore character right now.
I know this is a known bug, just wanted to include a video with examples that the devs could take a look at recreating to be able to resolve the root cause.
Thanks!