The tween part flies into the air when my player walks

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#1

When i walk while knife BiteHandle tween is playing, the part flies, idk why

Code:

		local bh = gun:WaitForChild("Model"):WaitForChild("BiteHandle")
		local ti = TweenInfo.new(1,Enum.EasingStyle.Circular,Enum.EasingDirection.InOut,0,false,0)
		local create = game.TweenService:Create(bh,ti,{CFrame=gun:WaitForChild("Model").BiteHandle2.CFrame})
		
		create:Play()

Video: