Exchange rate doesn’t work

HI. We have been using your plugin for a while now to set the exchange rate manually. For some countries where we sell, the price is multiplied x 1.30. So if, for example, I sell in Europe for 1 euro, the nations that pay in dollars will pay 1.30. Until the beginning of February this mechanism worked very well. Since about mid-February, it stopped working. Note that the problem occurs on accessories that can be added to the product which are managed through additional fields created with Themisle’s PPOM for WooCommerce plugin. It worked before. Not now. There is a solution? Thank you.