In one tool the function is working correctly, however in the other tool it is not - why?

Hello, dear scripters.

Maybe it is due to recent updates, but I have a little problem.

The first tool is a brick which makes sit every player who touches it. It's the LocalScript which is in the handle:

function onTouch(part) 
    local humanoid = part.Parent:FindFirstChild("Humanoid") 
    if (humanoid ~= nil) then   
        humanoid.Sit = true 
    end 
end

script.Parent.Touched:connect(onTouch)

However, I also have a tool which makes a ray and if it touches anybody, it should make the player sit. The problem is, it does not.

When I make a simulation of a server with two players, I see from the tool user's perspective that the target's humanoid "Sit" value is set to true on the Explorer.

Just when I switch to the target's perspective, its Sit value is set to false value on the Explorer.

If I made the humanoid lose health instead of sitting, however, it will loose health without any problems.

Here is the ray tool LocalScript:

local tool = script.Parent
local player = game:GetService("Players").LocalPlayer
pointing = false

tool.Equipped:connect(function(mouse)
    print("Tool equipped!")

    mouse.Button1Down:connect(function()
        pointing = true
        while pointing do
            print("Mouse pressed!")
            local ray = Ray.new(tool.Aim.CFrame.p, (mouse.Hit.p - tool.Aim.CFrame.p).unit * 300)
            local part, position = workspace:FindPartOnRay(ray, player.Character, false, true)

            local beam = Instance.new("Part", workspace)
            beam.BrickColor = BrickColor.new("Bright blue")
            beam.FormFactor = "Custom"
            beam.Material = "Ice"
            beam.Transparency = 0.25
            beam.Anchored = true
            beam.Locked = true
            beam.CanCollide = false

            local distance = (tool.Aim.CFrame.p - position).magnitude
            beam.Size = Vector3.new(0.3, 0.3, distance)
            beam.CFrame = CFrame.new(tool.Aim.CFrame.p, position) * CFrame.new(0, 0, -distance / 2)
            wait()
            beam:Destroy()

            if part then
                local humanoid = part.Parent:FindFirstChild("Humanoid")

                    if not humanoid then
                        humanoid = part.Parent.Parent:FindFirstChild("Humanoid")
                    end

                    if humanoid then
                        humanoid.Sit = true
                    end

            end

        end
    end)

        mouse.Button1Up:connect(function()
        pointing = false
        end)
end)

The game I am testing this on has Filtering Disabled.

I wish you could help me out.

Thank you.