Is :FindFirstChild() working properly here?

[TheStoneBros (Lunaraid)]

So my problem is that whenever the code shown below runs through, it’s supposed reset the player’s walkspeed if it is greater than what it’s supposed to be. However, when I try to say “and not check”, it still runs the code anyway. Is :FindFirstChild() running properly here and I should use a different technique, or is something else happening.

function module.ChangeSpeed(hitCharacter, Duration, Type, Multiplier)

	local hitHumanoid = hitCharacter:FindFirstChild("Humanoid")
	local walkSpeedStatMax = hitCharacter:FindFirstChild("Stats").SpeedStat.BaseSpeedStat.Value
	local curSpeedStat = hitCharacter:FindFirstChild("Stats").SpeedStat
	
	if Type == "SpeedDown" then
		local particleEmitter = game.ReplicatedStorage.EffectImages.SpeedEmitter:Clone()
		particleEmitter.Parent = workspace
		particleEmitter.Size = Vector3.new(hitCharacter.HumanoidRootPart.Size.X, hitCharacter.HumanoidRootPart.Size.Y, hitCharacter.HumanoidRootPart.Size.Z * 2)
		particleEmitter.CFrame = hitCharacter.HumanoidRootPart.CFrame
		
		--particleEmitter.ParticleEmitter.Rate = math.floor(particleEmitter.ParticleEmitter.Rate * Multiplier)
		
		local weld = Instance.new("WeldConstraint")
		weld.Parent = hitCharacter.HumanoidRootPart
		weld.Part0 = hitCharacter.HumanoidRootPart
		weld.Part1 = particleEmitter
		
		particleEmitter.ParticleEmitter.EmissionDirection = Enum.NormalId.Bottom
		particleEmitter.ParticleEmitter.Rotation = NumberRange.new(180, 180)

		local reducedWalkSpeed = math.floor(hitHumanoid.WalkSpeed / Multiplier)

		--set the character's walkspeed

		hitHumanoid.WalkSpeed = reducedWalkSpeed
		
		curSpeedStat.Value = hitHumanoid.WalkSpeed

		wait(Duration)

		hitHumanoid.WalkSpeed = hitHumanoid.WalkSpeed * Multiplier

		particleEmitter:Destroy()
		weld:Destroy()
		
		local check = hitCharacter:FindFirstChild("SpeedEmitter")
		if hitHumanoid.WalkSpeed > walkSpeedStatMax and not check then
			hitHumanoid.WalkSpeed = walkSpeedStatMax
		end
		curSpeedStat.Value = hitHumanoid.WalkSpeed
		return
	elseif Type == "SpeedUp" then
		local particleEmitter = game.ReplicatedStorage.EffectImages.SpeedEmitter:Clone()
		particleEmitter.Parent = workspace
		particleEmitter.Size = Vector3.new(hitCharacter.HumanoidRootPart.Size.X, hitCharacter.HumanoidRootPart.Size.Y, hitCharacter.HumanoidRootPart.Size.Z * 2)
		particleEmitter.CFrame = hitCharacter.HumanoidRootPart.CFrame
		
		particleEmitter.ParticleEmitter.Rate = math.floor(particleEmitter.ParticleEmitter.Rate * Multiplier)
		
		local weld = Instance.new("WeldConstraint")
		weld.Parent = hitCharacter.HumanoidRootPart
		weld.Part0 = hitCharacter.HumanoidRootPart
		weld.Part1 = particleEmitter

		particleEmitter.ParticleEmitter.EmissionDirection = Enum.NormalId.Top

		local IncreasedWalkSpeed = math.floor(hitHumanoid.WalkSpeed * Multiplier)

		--set the character's walkspeed

		hitHumanoid.WalkSpeed = IncreasedWalkSpeed
		
		curSpeedStat.Value = hitHumanoid.WalkSpeed

		wait(Duration)

		hitHumanoid.WalkSpeed = hitHumanoid.WalkSpeed - (IncreasedWalkSpeed - walkSpeedStatMax)

		particleEmitter:Destroy()
		weld:Destroy()

		local check = hitCharacter:FindFirstChild("SpeedEmitter")
		if hitHumanoid.WalkSpeed < walkSpeedStatMax and not check then
			hitHumanoid.WalkSpeed = walkSpeedStatMax
		end
		curSpeedStat.Value = hitHumanoid.WalkSpeed
		return
	end
end

[StraightScared (Straight)]

instead of doing “and not check” try this

if hitHumanoid.WalkSpeed < walkSpeedStatMax  then
if check then
print("Check Works")
else
hitHumanoid.WalkSpeed = walkSpeedStatMax
end
			
end

This is a good way to debug, since nesting the if statements would give us the same result you are looking for.

[TheStoneBros (Lunaraid)]

hold on, im an idiot, just realized i put it into workspace, not the character. originally did that to prevent hitbox issues but i see the issue now