Background of the issue:
I'm translating content separately using the WordPress editor across my entire website. On multiple pages, when I edit the original language, the translated page content gets overwritten by the original language, as if the pages are synchronized even though the pages are being translated independently. I believe this is a known issue: https://wpml.org/errata/editing-translated-posts-directly-can-result-in-lost-content/ I'm experiencing it across all my websites, regardless of the theme or page builders I'm using.
Symptoms:
Translated page content gets overwritten by the original language when editing the original language.