Alexander

Problem:
If you're experiencing an issue where segments that you joined in the Advanced Translation Editor are splitting again and their translations are disappearing after marking them as complete, it might be due to updates to the original content.

Solution:
We recommend using the "Join & Unjoin" feature in the Advanced Translation Editor to manage how sentences are joined. However, please note that joined segments will split again if the original content is updated. There is no setting within WPML to prevent this, as the Advanced Translation Editor operates on an external server.
For guidance on using the "Join & Unjoin" feature, please see the documentation here: https://wpml.org/documentation/translating-your-contents/advanced-translation-editor/#joining-sentences

Please be aware that the solution provided might be irrelevant if it's outdated or not applicable to your case. We highly recommend checking the related known issues at https://wpml.org/known-issues/, verifying the version of the permanent fix, and confirming that you have installed the latest versions of themes and plugins. If the issue persists, we encourage you to open a new support ticket for further assistance.