[Risolto] Translation 'Add to cart' not saving correctly

Background of the issue:
I am trying to translate the 'Add to cart' button on my website.

I find exact match & all translation and I can find in domain woocommerce - add to cart & see the translation as shown on the website.
So I did translate it to something else I want. It gets saved but when I refresh nothing has changed on the website, also the old translation is back in the translated field.

Symptoms:
The translation for 'Add to cart' is not saving correctly. I expected to see the translated version I chose, but instead, I got the version WooCommerce chooses.

Questions:
Why is the 'Add to cart' translation not saving correctly?
How can I ensure the correct translation is displayed?