Animations braking after holding down two movement keys

[mopsey2017 (Rhino)]

Im making a jojo-inspired game and Im working on making the stand lean whenever the player is moving or running. I want to make it so that the idle animation doesnt start playing if the player quickly switches between moving left and right and ends up pressing both a and d for a split second. This works, although when you hold down both keys I made is so that the stands idle animation plays after a a second. Problem is that when you stop holding both keys the animation that you didnt hold both keys down during (ex: after holding down both a and d for a few seconds while walking, after you release the stand’s running animation brakes) Why is this happening?

local RunService = game:GetService("RunService")

local Player = game.Players.LocalPlayer
local Character = Player.Character
local Humanoid = Character.Humanoid
local uis = game:GetService("UserInputService")

local Stand = script.Parent

local SprintAnim = Stand.AnimationController:LoadAnimation(script:WaitForChild("Run"))
SprintAnim:Play()
local LeanAnim = Stand.AnimationController:LoadAnimation(script:WaitForChild("Lean"))
LeanAnim:Play()

function TwoDown()
	if uis:IsKeyDown(Enum.KeyCode.A) and uis:IsKeyDown(Enum.KeyCode.D) or uis:IsKeyDown(Enum.KeyCode.W) and uis:IsKeyDown(Enum.KeyCode.S) then
		return true
	else
		return false
	end
end

RunService.Heartbeat:Connect(function()
	if Humanoid.MoveDirection == Vector3.new(0, 0, 0) then
		if TwoDown() then
			wait(.3)
			if TwoDown() then
				LeanAnim:AdjustWeight(0)
				SprintAnim:AdjustWeight(0)
			end
		else
			LeanAnim:AdjustWeight(0)
			SprintAnim:AdjustWeight(0)
		end
	elseif Humanoid.MoveDirection ~= Vector3.new(0, 0, 0) and uis:IsKeyDown(Enum.KeyCode.LeftShift) then
		SprintAnim:AdjustWeight(1.001)
		LeanAnim:AdjustWeight(0)
	elseif Humanoid.MoveDirection ~= Vector3.new(0, 0, 0) then
		LeanAnim:AdjustWeight(1.001)
		SprintAnim:AdjustWeight(0)
	end
end)

walk anim braking

anonymous

running anim braking:

anonymous