This thread is resolved. Here is a description of the problem and solution.
Problem:
If you're experiencing issues where the bundle ID is not correctly pointing to its translated version in WPML, despite being set to copy, this might be similar to the issue we encountered. In this specific case, the bundle ID 20 was not automatically pointing to its translated counterpart, ID 21.
Solution:
We recommend checking the settings to ensure that the IDs are correctly linked for translation. If the problem persists, it may require further investigation by our compatibility team. We will keep the client updated on any progress.
Please note that this solution might be outdated or not applicable to your specific case.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/product-bundle-dissapear/