WooCommerce

Can anyone help with a WooCommerce issue on here?

Basically I have set my shipping tax class to ‘Shipping tax class based on cart items’.

I have 3 Tax Classes, Zero, Reduced and Standard. Which are 0%, 5% and 20% respectively.

If I have a products in the cart that are a mix of only the Zero and Reduced Tax Classes, then, WooCommerce still adds the 20% standard rate on for shipping. Which is not correct, as I want the tax rate to be inherited from the items in the cart.

Any help?