A family of Microsoft word processing software products for creating web, email, and print documents.
Thanks for the update, Anurag.
Since the issue happens in all apps and Hindi Traditional works fine, it confirms the problem is with the Hindi Phonetic keyboard itself, likely due to a recent Windows update. You've done the right steps by updating Windows and sending feedback through the Feedback Hub.
While waiting for Microsoft to fix it in a future update, you can use Google Input Tools (online) as a temporary option for Hindi typing.
Take care and all the best,
Arlene D.