[Resolved] After translation, the Product field missing.

Background of the issue:
I use the Advanced product field for woocommerce (BY StudioWombat) to add a extra field on the product page, but after translation, the product Field do not show up. For example, default url with product field:
hidden link
after translated, the product field missing:
hidden link

Symptoms:
After translation, the Product field is missing on the translated product page.

Questions:
Why does the product field not show up after translation?
How can I ensure the product field is displayed on the translated page?