[Закрытые] Inventory error for translated products

Background of the issue:
I am trying to manage inventory for translated products using the Rental&Booking plugin with WooCommerce. The products are originally created in English and translated into French and German. I found the FAQ of RnB and WPML but cannot resolve my problem. Here is the link to a page where the issue can be seen: скрытая ссылка

Symptoms:
The English products display the correct inventory, but the translated French and German products show missing inventory. The inventory is supposed to be translated too.

Questions:
Should I open every translated product and add the inventory one by one?
Is there a better solution to manage inventory for translated products?