What

• The fields product_quantity and product_quantity_unit are not returned when also requesting some nutrition facts.

Steps to reproduce the behaviour

1. Click on https://fr.openfoodfacts.org/api/v2/product/3254560034709?fields=product_name,brands,product_quantity,product_quantity_unit,nutrition_grade_fr,nova_group,energy-kcal_100g
2. The product_quantity and product_quantity_unit fields are absent even though they were requested.
3. Now click on https://fr.openfoodfacts.org/api/v2/product/3254560034709?fields=product_name,brands,product_quantity,product_quantity_unit,nutrition_grade_fr,nova_group
4. The product_quantity and product_quantity_unit fields are present this time.

Expected behaviour

• The product_quantity and product_quantity_unit fields should be present in both cases.

Why

• It seems that the product_quantity and product_quantity_unit fields are not returned when requesting at the same time nutrition facts.