VAT calculated twice on variable products

Hi evrybody, I have an issue on setting tax on woocommerce variable product

The value of price shown on fron-end product page is wrong (tax calculated twice), only for variable products.
For example with an inserted net price of 10€ and VAT 22%, the value shown is 14,88€ instead of 12,22.
If I set {price_including_tax} next to the price, the correct value is shown only on suffix (es.: 14,88€ followed by 12, 22€).

Value of price on cart is correct.

Tax Setup is as follows:
Prices inserted with no tax
Client shipping address referral
TAx on shipping set to zero rate
Show prices on shop with tax included : yes
Show prices on cart with tax included: yes
exposed price suffix = {price_including_tax}

and on product page
ON GENERAL:
parent tax status: taxable income
parent tax rate : standard (22%)

ON VARIATION:
variant product tax rate : as parent

Any suggestion? Thank you