Can't Lunge to Lagon's 2 tentacles in Lagon fight

Bug Reports
1

Not sure if it’s the angle.

  1. I might be able to Lunge to the tentacle sometimes.
  2. Then stand still and keep melee attacking it.
  3. Then cannot Lunge again after Lunge recovers its cooldown. Pressed the key and nothing happened.
    I need to move around to be able to Lunge.
    This happens 7~8 out of 10 times.

But there’s no such problem in Temple of Lagon.