Hey there LE team. Lunge is definitely in a better state than it was prior to your fix, but I still get stuck sometimes when using it. I think I see the reason. It appears to be when something you were trying to target is no longer a valid target. This seems to happen both when the target dies, or if the target moves behind some terrain or barrier, right as the skill is used.
My guess would be that in multiplayer it has to do with the target being valid upon skill use on the client side, but server side it’s not (or it was valid prior to the input delay, but is no longer valid after the input delay). Just a guess, but hopefully that helps.