1. It apply AoE debuff. So it just wrong that you can dodge aoe.
2. It was undodgeable for 4 years and was only recently ninja made into dodgeable for some unknown reason. Now again undodgeable.
Sounds more like it was bug that was fixed.
Like many projectiles it seems to matter when you get out of LoS, I've seen it bend around a corner a few times, not that its the only skill in the game that does that.