Hi,
Please cross-check the following points.
1. After updating the attribute values cross-check with feature class attribute values in Arc Catalog whether it's linked or not.
2. If you linked the newly added coded values is linked with feature class than open arcmap and remove the feature class and add once again
3. Enable the editing model and open attribute table and check.
If problem still persists, please let me know.
Regards,
Kiran