Same game object behaving strangely (SOLVED)

Questions
3

Sure!

the anomaly script (attached to the gameobject):
(I need to check on editor to activate the effect)

if self.movement then
			movement.initiate(go.get_position(), self.movement_delay, self.movement_range, self.movement_speed)
		end

then the main moviment.lua (a module):
(sorry my code is a mess)

function A.initiate(initial_pos, delay, range, speed)
    A.isMoving = false
    local delay = delay or A.delay
    local range = range or A.range
    local speed = speed or A.speed_mult

    math.randomseed(os.clock() * 10000000)

    timer.delay(
        delay,
        true,
        function()
            if not A.isMoving then
                A.isMoving = true
                local next_pos =
                    vmath.vector3(
                    math.random(initial_pos.x - range, initial_pos.x + range),
                    math.random(initial_pos.y - range, initial_pos.y + range),
                    0
                )

                local distance = vmath.vector3()
                distance.x = go.get_position().x - next_pos.x
                distance.y = go.get_position().y - next_pos.y

                local sc = math.sqrt(distance.x * distance.x + distance.y * distance.y)

                go.animate(
                    ".",
                    "position",
                    go.PLAYBACK_ONCE_FORWARD,
                    next_pos,
                    go.EASING_OUTELASTIC,
                    speed * sc,
                    0,
                    function()
                        A.isMoving = false
                    end
                )
            end
        end
    )
end

thanks!