[Chiuso] Updated wpml-string-translation, the language have bug

Background of the issue:
I updated the wpml-string-translation plugin. I was trying to ensure that the header and footer templates display the correct language. You can see the issue on this page: link nascosto.

Symptoms:
The header and footer templates are displaying in Chinese on the English page. When I edit the template file, it shows the correct language, but after saving, both languages use the same language.

Questions:
Why are the header and footer templates displaying in the wrong language?
How can I fix the language issue in the header and footer templates?