Why does my NPC stop moving when its on the players head?

The pathfinding script works ok, the big problem is that if the Player jumps on the bot's head, it will just stand still and do nothing. This also happens if the bot ends up on the players head. This is the script.

A gif of what happens when the player is on the bots head: https://gyazo.com/658f26c3f213198bb93d6d1b13c7291f

Another gif of the bot attacking the player when its on ground, but doing nothing when the player manages to jump onto its head: https://gyazo.com/d45ef6a021ed9a01ceaea612c13ce6f0

function findNearestTorso(pos)
	local list = game.Workspace:children()
	local torso = nil
	local dist = 1000
	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) then
			if string.match(temp2.Name, "Dummy") or string.match(temp2.Name, "dummy") or string.match(temp2.Name, "Gyro") then else
			temp = temp2:findFirstChild("Torso")
			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
	end
	return torso
end


coroutine.resume(coroutine.create(function()
print("the walk coroutine started")
while true do
	wait(0.3)
	local target = findNearestTorso(script.Parent.Torso.Position)
	if target ~= nil then
		script.Parent.Humanoid:MoveTo(target.Position, target)
	end
	end
end))

How can I edit this script so that when the player ends up on the bots head, the bot will adjust itself until the player falls off the bots head? I also want this to happen if the bot ends up on the players head. Any and all help is appreciated.

Taking a quick glance at the problem and script I can take a guess at what your trying to achieve.

while wait(1) do
	if dummy.Head.YPosition < Torso.YPosition then
		-- make a new path with math.random. I would recommend using Humanoid.Jump as well. 
wait(0.5)
		if dummy.Head.YPosition < Torso.YPosition then
			-- repeat that code
		else
			break
		end
	end
end

If this is not what your looking for sorry.