Newly assigned taxonomy terms cannot be edited once translation created.

How to reproduce:
1. Assign a category to a non-translated post.
2. Translate the post. It also gives to a field to translate the applied category.
3. Go back to the original post.
4. Assigned different categories and save.
5. Go back to the translation. Still only showing the previously assigned category to edit?

Reproduce the issue in the WordPress post editor using the five steps in the report, focusing on taxonomy assignment before and after translation. Trace how the original post's changed categories are presented on the translation, and consider the issue resolved when the translation exposes the newly assigned terms for editing.

Written by the indexing model from the issue text.