How to improve collision physics within my coin pusher?

I'm attempting to create a coin pusher machine, however, the physics prove to be kind of finicky as demonstrated with this clip:

https://gyazo.com/07c7f1fb6346c2fb60e745e1647c1fb8

The "pusher" is using a CFrame Tween to move, I believe this to be the issue as interactions between the other coins works without problem, but if a coin lands on the pusher as it's moving, it seems to "freeze" it's physics until left alone for a second.

This is the script that manages the pusher:

local tws = game:GetService("TweenService")
local part = script.Parent

local cf = script.Parent.CFrame


local AnimDuration = 5
local isActive = true
local paramsF = 
{CFrame = cf * CFrame.new(0,0,10)}
local paramsB = 
{CFrame = cf * CFrame.new(0,0,-10)}

local TweenF = tws:Create(script.Parent, TweenInfo.new(AnimDuration), paramsF)
local TweenB = tws:Create(script.Parent, TweenInfo.new(AnimDuration), paramsB)


while true do
	if isActive then
		cf = script.Parent.CFrame		
		paramsF = 
		{CFrame = cf * CFrame.new(0,0,10)}
		TweenF = tws:Create(script.Parent, TweenInfo.new(AnimDuration), paramsF)
		TweenF:Play()
		wait(AnimDuration)

		cf = script.Parent.CFrame
		paramsB = 
		{CFrame = cf * CFrame.new(0,0,-10)}
		TweenB = tws:Create(script.Parent, TweenInfo.new(AnimDuration), paramsB)
		TweenB:Play()
		wait(AnimDuration)
	end
end