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