Problems with non-EEC countries

Good evening,
I was able to charge the same amount everywhere and absorb the differences in taxes.
And this is exactly the goal I wanted to achieve. To do this I add the code in functions.php
add_filter( ‘woocommerce_adjust_non_base_location_prices’, ‘__return_false’ );

So for example, if someone buys from Luxembourg, they will pay 100 € where 83 € is the cost of the product and 17 € is the VAT. Similarly another person from Sweden, for the same product, will still pay 100 € where the cost is 75 € plus 25 € of VAT. In the other hand, someone from Russia will pay 100 € with 100€ of product and 0 in VAT.
And it works perfectly for me.

Now I needed a plugin to do the tax report, so I tried your plugin.
It works until someone buys from outside Europe, in which case they pay only 78 € (as if they take the price of the shop’s home state as a base with no added taxes). It seems that the code I added does not work outside of Europe.
Can you help me understand why and how to solve this problem?

Thank you in advance for your time.