This thread is resolved. Here is a description of the problem and solution.
Problem:
If you're experiencing issues where segments become untranslated after saving them in the Advanced Translation Editor (ATE), even though you've translated every segment and saved the translation, this might be similar to the issue we recently addressed.
Solution:
We recommend checking if any translations are flagged for "save later". This can sometimes occur without immediate notice. If you find such flags, you should complete these translations and save again. If the problem persists, translating additional pages might help identify if the issue is recurring or isolated.
Please note that this solution might be outdated or not applicable to your specific case. We highly recommend checking 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 continues, please do not hesitate to open a new support ticket at WPML support forum.
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This topic is split from https://wpml.org/forums/topic/primary-categroy-translation/