The QoT's root (basic) attack has an animation error. When the root attack hits the target, it then recoils into the ground. However, instead of disappearing after receding into the ground it continues to lower, leading to the root "dropping" off of the bottom of some maps. This can be seen in the following pictures, notice the root circled in red.
After some digging I found the solution. It involves reducing the length of time the after hit effects last. It is much more visibly appealing, nor does it sacrifice much of the visual appeal of the attack.
How to Fix it
To impliment this fix two changes in HQueen_Script.lua are required.
These are lines 83 & 132 on my version.
local proj = self.unit:CreateProjectile('/projectiles/HQueenSpike01/HQueenSpike01_proj.bp', dist, 0, dist, direction, direction, direction):SetLifetime(1)
should be changed to
local proj = self.unit:CreateProjectile('/projectiles/HQueenSpike01/HQueenSpike01_proj.bp', dist, 0, dist, direction, direction, direction):SetLifetime(.25)
What the fix does:
This fix reduces the duration of the post hit animation. The animation places the root project at the target location and then drops it below the surface. The first problem is that this animation is too long resulting in seeing the root drop below the bottom of the structure the demigods are fighting on. This is fixed by reducing the projectile lifetime to below 400ms. The actual value depends upon the speed of the animation (which is related to projectile speed defined in HQueen_unit.bp, at least it seems that way) and the length of the root object. A value of around 400 ms is about right. The second problem is that the root projectile is too long for some maps (i.e., Cataract). Even if the projectile animation ceases immediately after going below ground, the bottom of the root can still be seen poking out of the bottom of the map, this requires a more extreme reduction in projectile duration to approximately 250 ms. The unfortunate side effect of this reduction is that this means the root will dissappear before it goes entirely below ground. However, the difference in animation is roughly 150 ms and is difficult to observe even if you are aware of the flaw and fully zoomed in.