When Throwing umbral blades with the cacophony of steel node it “teleports” when reaching its final destination and jump further and then stops at a new much further distance then what i assume is intentional.
video evidence Last epoch umbral blade bug - YouTube
This has happens all over so the location is not important in the video, However it seems that if im “raised” by the ground be it a slope, platform or some kind of geometric lift it dosent happen´.