Using Lunge against Idol of Loathing in The Precipice seems to have bit of a bad targeting. The problem seems to be that the lunge targets the “body” of the worm, not the head like normal attacks. Thus you will lunge into that wooden bridge through which the enemy emerges. And that bridge is normally not reachable. During fight you can get free from there (even without lunging to adds I think), but once you kill the boss, you can get stuck there and can’t reach the time rift.
Not a gamebreaking bug since you can use teleport to go back to town and just run through the area(s) and fight the boss again, but that is rather inconvinient.
This was with patch 0.7.9