This thread is resolved. Here is a description of the problem and solution.
Problem:
You are trying to update a blog post in the original language and expect the featured image to automatically sync across all translations. However, when you update the featured image in the original post, it does not update in the translated versions. Additionally, if you create a new translation, the featured image is not set in the translated post, and if the translated post already had a featured image, the old image remains even after updating the source post.
Solution:
First, navigate to WPML > Settings > Media Translation and ensure that the option "Duplicate the featured images for translated content" is checked. Then, run the sync using the Start button. If this does not resolve the issue, make sure that you have selected "Translatable - only show translated items" for your Media Custom Post Type (CPT). This setting adjustment should help in syncing the featured images correctly across translations.
If the solution provided here does not resolve your issue, or if it seems outdated or irrelevant to your case, we highly recommend checking related known issues at https://wpml.org/known-issues/, verifying the version of the permanent fix,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. Should you need further assistance, please do not hesitate to open a new support ticket at WPML support forum.
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