Not a bug
After importing content with categories using the WPML All Import, categories are not imported if their translated name is the same as in the original language.
English Category Name: cat1
French Category Name: cat1
This is a feature limitation of WPML All Import.
- Make sure that the translated taxonomies have a different name as the original taxonomies before import
- Follow instructions to import here here https://wpml.org/documentation/related-projects/wpml-all-import-plugin-website-import-with-wpml/
- The translated category names can be changed back once it is properly imported.