[Risolto] Custom changes after automatic translation

Background of the issue:
I have translated everything automatically using WPML. Now, I want to show the original language for some parts that were also translated automatically. When I edit the translation, copy the original content, and click save, nothing changes.

Symptoms:
On the translated page, it still shows the automatically translated content. My changes are completely ignored.

Questions:
Why are my manual changes to the translation not being saved?
How can I display the original language for specific parts after automatic translation?