How do I fix my NPC to look at the player correctly?

I have a server script in this NPC and its suppose to look at the closest player, the problem is when I rotate the NPC and the player jumps it tilts it's head sideways to the right but tracks the player correctly when just walking around

local function observePlayer()
	local cFrame0 = neck.C0
	while true do
		local player = findClosestPlayer()
		if player then
			local look = dummy.UpperTorso.CFrame.LookVector
			local facingDirection = (player.HumanoidRootPart.Position - dummy.Head.Position).Unit
			local dot = look:Dot(facingDirection)
			local angle = math.deg(math.acos(dot))
			
			local isNotAbove = dummy.PrimaryPart.CFrame:ToObjectSpace(player.PrimaryPart.CFrame).Y < 2
			-- can be used to detect if dummy is above
			
			local isInFront = dummy.PrimaryPart.CFrame:ToObjectSpace(player.PrimaryPart.CFrame).Z < 0		
			if isInFront and angle <= 60 then
				local unit = -(dummy.PrimaryPart.CFrame.p - player.PrimaryPart.Position).unit 
				neck.C0 = cFrame0 * CFrame.new(Vector3.new(0,0,0), unit) * CFrame.Angles(math.rad(dummy.PrimaryPart.Orientation.X), -math.rad(dummy.PrimaryPart.Orientation.Y), 0)
			end
		end
		wait()
	end
end