Animation script Roblox Studio

I'm making a dash but when I run the game it doesn't work as well as I expected, the first 2 dashes don't work well, the third one already works. and then at the end of the dash that transitions to being still or walking, your feet accelerate a lot. I disguised it by changing the dash time and velocity, but would someone here know something more?

--Servicios
local player = game:GetService("Players").LocalPlayer
local repStorage = game:GetService("ReplicatedStorage")
local UIS = game:GetService("UserInputService")
local runservice = game:GetService("RunService")
local debris = game:GetService("Debris")
local character = player.Character or player.CharacterAdded:Wait()
local loadedAnimation 


local fxFolder = repStorage.Fx
local dustFx = fxFolder.DustFx
local smokeFx = fxFolder.SmokeFx

-- Configuracion Dash
local key = Enum.KeyCode.Q -- Tecla para hacer el Dash
local velocity = 20000 -- velocidad del dash
local debounce = false
local cooldown = 0.20 -- Cooldown despues del Dash
local duration = 0.25 -- duracion del dash
local sideDash = false
local DashLeft = script:WaitForChild("DashLeft")
local DashRight = script:WaitForChild("DashRight")

--Variables para DustFX
local character = player.Character or player.CharacterAdded:Wait()
local humanoid = character:WaitForChild("Humanoid")
--Partes donde se adjunatara el efecto
local lfoot = character:WaitForChild("LeftFoot") --LeftLowerLeg  / LeftFoot
local rfoot = character:WaitForChild("RightFoot") --RightLowerLeg / RightFoot
--Aca las Particulas del efecto
local fx1 = game.ReplicatedStorage.Dash.Fx.DusFX.Dust:Clone() --Fx.DusFX.ef:Clone()
fx1.Parent = rfoot
local fx2 = game.ReplicatedStorage.Dash.Fx.DusFX.Dust:Clone()
fx2.Parent = lfoot
fx1.Enabled  = false
fx2.Enabled  = false




local function UserInputButton (input, Keyboard)
    --si esta suando el teclado para escribir en el chat salgo
    if Keyboard == true then
        return
    end
    --si no esta suando el teclado para escribir continuo
    if input.KeyCode == key then
        Dash()      
    end
end


UIS.InputBegan:Connect(UserInputButton)


function Dash()

    if DashLeft == nil and DashRight == nil then return end

    if character and not debounce then
        debounce = true
        -- aca comienza el script del dash
        local humanoid = character.Humanoid
        local HRP = character.HumanoidRootPart

        --aca cambio el dash

        sideDash = not sideDash

        -- Cargamos la animación correspondiente

        if sideDash then
            loadedAnimation = humanoid.Animator:LoadAnimation(DashRight)
        else
            loadedAnimation = humanoid.Animator:LoadAnimation(DashLeft)
        end

        local dashDirection = nil
        local moveDirection = humanoid.MoveDirection
        local lookVector = HRP.CFrame.LookVector
        local minusVelocity = -velocity 

        --Chequeo que este en el piso y no flotando
        local isOnGround = humanoid.FloorMaterial ~= Enum.Material.Air and humanoid.FloorMaterial ~= Enum.Material.Water

        if isOnGround then          

            if moveDirection == Vector3.new(0,0,0) then -- si no se esta moviendo then
                dashDirection = HRP.Position + Vector3.new(lookVector.x, 0, lookVector.z)
            else
                dashDirection = HRP.Position + Vector3.new(moveDirection.X, 0, moveDirection.Z)
            end 

            --usando bodygiro para rotar al jugador en la direccion del dash suavemente
            local bodyGyro = Instance.new("BodyGyro")
            bodyGyro.Parent = HRP
            bodyGyro.MaxTorque = Vector3.new(math.huge,math.huge,math.huge)
            bodyGyro.D = 0-- is the dampening
            bodyGyro.P = 500000 -- es la agresividad
            bodyGyro.CFrame = CFrame.lookAt(HRP.Position, dashDirection) -- mira hacia donde esta y luego dash

            local attachment = Instance.new("Attachment")
            attachment.Parent = HRP

            local vectorForce = Instance.new("VectorForce")
            vectorForce.Parent = HRP
            --vector necesario para adjuntar a donde esta mirando el jugador
            vectorForce.Attachment0 = attachment
            --now it will move player foeward as the settings 
            vectorForce.Force = Vector3.new(0,0,minusVelocity)

            loadedAnimation:Play() -- comienzo la animacion
            humanoid.AutoRotate = true -- previene que el personaje se rote en si mismo
            DustFx(true, fx1, fx2)
            
            wait(duration)

            humanoid.AutoRotate = true
            

            vectorForce:Destroy()
            bodyGyro:Destroy()
            attachment:Destroy()

            -- Establecer la velocidad a cero
            humanoid.RootPart.Velocity = Vector3.new(0, 0, 0)
            loadedAnimation:Stop()      
            DustFx(false, fx1, fx2)
        end     
        wait(cooldown)
        debounce = false        
    end 
end


function DustFx(active, fx1, fx2)
    if active then
        fx1.Enabled  = true
        fx2.Enabled  = true
    else
        fx1.Enabled  = false
        fx2.Enabled  = false
    end
end

--Buscar Boton y hacer dash
local function getImageButton()
    local ScreenGuiBoton = player:WaitForChild("PlayerGui"):WaitForChild("ScreenGuiBotón")
    local ImageButton = ScreenGuiBoton:FindFirstChild("ImageButton") 

    if ImageButton then
        return ImageButton      
    else
        return nil 
    end
end

local TextBoton = getImageButton()
TextBoton.MouseButton1Click:Connect(Dash)