Bugs and Imbalance of Scorpion Wire
The “reverse pull” occurs if an opponent is using a skill that reflects projectiles. For instance, if an engineer activates magnetic shield just before the scorpion wire hits them, it will “reflect” it and pull you instead. As such, I don’t believe that’s part of the bug.
As for the pull not pulling, that’s a bug with virtually all pull/push skills. The thought it that it’s somehow linked to some interaction with the terrain, whereby they “bump” into it or something and it stops the pull.
In some cases, it’s just a latency issue, as the opponent will actually be pulled, but the visual representation does not show the pull occurring properly. Then, once the opponent recovers from being pulled, they “blink” on your screen to the position they were actually at. This is also similar to when it looks like someone falls off a ledge, but then they magically appear back on the surface they fell off of.
As for the obstruction and out of range cases, those affect a lot of different projectile skills as well.
So it’s not a bug concerning scorpion wire itself, but just general bugs that affect system mechanics as a whole. They’ve been around for a long time, but I imagine the cause of the bugs is deeply rooted in the game engine and are thus not easily fixable. Hopefully we will see them properly fixed at some point though.
What troubles me is that this never seems to be a problem for magnet. Maybe its just because its a channeled skill..?