[Resuelto] Categories are bugging out

Background of the issue:
I am translating my website from English to French using WPML. When I translate a post, the original post's categories are replaced by the target language categories, affecting the slug of the original article.

Symptoms:
The original post's categories are replaced by the target language categories, impacting the slug of the original article. This issue occurs on some articles but not others, requiring manual correction.

Questions:
Why are the original post's categories being replaced by the target language categories?
How can I prevent the slug from being affected when translating posts?