Hello @Keudlahaine,
Thank you for your report and sorry for the inconvenience it caused you.
We confirmed that Ground-type Pokémon should be affected by Thunder Wave when it's used by a Pokémon having the Normalize Ability.
This issue has been forwarded to our Developers and hopefully it will be fixed soon.
Feel free to continuously report anything you think is bugged in the Bug Resolution Center.
Regards,
Gyze