Pathfinding doesn't work when finish point is above starting point... Why?

This started a while ago when I was using the old pathfinding (not the new one that was just released today) where a path just wasn't generated when the finish point was somewhat above the starting point. I thought the updated pathfinding would fix this problem, but it's still the same. I have zombies that chase you, but they just stop when you jump or you're above them. Here's the code, check it out and please help me figure out what's wrong!

wait()
local enemies = script.Parent.EnemyFolder.Value

function findNearestTorso(pos)
	local list = enemies:GetChildren()
	local torso = nil
	local dist = 1024
	local temp = nil
	local human = nil
	local temp2 = nil
	for x = 1, #list do
		temp2 = list[x]
		if (temp2.className == "Model") and (temp2 ~= script.Parent) and game.Players:GetPlayerFromCharacter(temp2) then
			temp = temp2:findFirstChild("HumanoidRootPart")
			human = temp2:findFirstChild("Humanoid")
			if (temp ~= nil) and (human ~= nil) and (human.Health > 0) then
				if (temp.Position - pos).magnitude < dist then
					torso = temp
					dist = (temp.Position - pos).magnitude
				end
			end
		end
	end
	return torso
end

while wait() do
	if script.Parent ~= nil then
		local target = findNearestTorso(script.Parent.HumanoidRootPart.Position)
		if target then
			local path = game:GetService("PathfindingService"):FindPathAsync(script.Parent.HumanoidRootPart.Position, target.Position)
			local waypoints = path:GetWaypoints()
			if #waypoints > 2 then
				script.Parent.Humanoid:MoveTo(waypoints[3].Position)
				if waypoints[3].Action == Enum.PathWaypointAction.Jump then
					script.Parent.Humanoid.Jump = true
				end
			elseif #waypoints >= 1 then
				script.Parent.Humanoid:MoveTo(waypoints[2].Position)
				if waypoints[2].Action == Enum.PathWaypointAction.Jump then
					script.Parent.Humanoid.Jump = true
				end
			end
		end
	end
end