Floating Shopping Cart doesn't show coupon discounts and then they remove!

Hi,

I apply a coupon code discount to my shopping cart. Click continue shopping but my floating shopping cart still shows the full price

Then when I'm on my booking page I click on the floating cart and "view cart" when I go back to the cart page the coupon code has been removed

I must add I'm using this with Appointments+

Kind Regards
Kieran