Price Changes Not Working On Variable Products

Hi,

We are using the Prices and Currencies by Country for WooCommerce plugin and it works great for all products except variable products.

For some reason on a variable product the price shown on the product category page and individual product page is reduced by the tax rate even though tax isn’t applicable

For example, the product called 100 Beer Mats has a regular price of £13.33 (excluding tax) so this makes it £16 in the UK including tax. We have set the international price to £16 so it matches, but on the product category page (https://imgur.com/xr6eFmA) and individual product page (https://imgur.com/rtUWwGE) the price is shown as £13.33 but if you add the product to the cart it changes to £16 (https://imgur.com/tVv5DlH)

This issue only happens on variable products and I have deactivated other plugins and changed themes to test for a conflict. We enter our prices excluding tax and have a 20% tax rate set for the UK only.

Is there a setting somewhere we need to change to get the price changes to work on variable products?

Thanks