Manually editing translated variable products loses variations

Overview of the issue

Once products have been translated, if you then manually edit a translated variable product based on global attributes in the WordPress editor and save changes the variations will become disconnected. They will appear missing from the back-end editor and also it will not be possible to choose variations from the front end product screen.

Workaround

The issue was introduced in WooCommerce Multilingual & Multicurrency version 5.5.0.

We are working on a fix, but in the meantime you can edit the file plugins/woocommerce-multilingual/classes/Synchronization/Manager.php and update line 77 from

$originalProduct = get_post( $originalProduct );

to

$originalProduct = get_post( $originalProductId );

Note, if you still experience problems after applying this fix, go to WPML > Settings and make sure the setting “Copy taxonomy to translations” is checked.