The information of the touchpad cannot accurately obtain the number of fingers

[Autumn-one]

I wrote the following code. Then, during the test, I found that when one finger was placed at the bottom of the touchpad and remained stationary, and another finger moved on the touchpad, the resulting touchpad information could only obtain the information of one finger

touchpadWatcher = hs.eventtap.new({hs.eventtap.event.types.gesture}, function(event)
    local touches = event:getTouches()
    local touchCount = #touches

    print("finger number: " .. touchCount)

    for i, touch in ipairs(touches) do
        print(string.format("finger %d: x = %f, y = %f", i, touch.normalizedPosition.x, touch.normalizedPosition.y))
    end
end)

touchpadWatcher:start()