Me and my friend have been able to consistently recreate the bug, it always happen when you try to lunge to an enemy that is invisible and hasn’t spawned yet but will spawn as soon as you approach them. We recreated the bug with 2 types of enemies (Slaughtered Thralls and Emerald Nagasas) as well as the scorpions from the Shrine of Scorpions. I included a recording from my friend https://puu.sh/JBJ73/516b1bc7b9.mp4
I’ve noticed this too when I was playing. It does it against the worm things too. It may do it with offscreen enemies too because there sometimes isn’t underground/invisible enemies when targeting.