If you test with the API, instead of through AI Studio, you will get the specific block. I expect you will see that the finishReason code is OTHER.
You are almost certainly right that Gemini understands kannada. It isn’t on the list, however: Gemini API | Google for Developers
Languages not listed are subject to that behavior, getting blocked. We have seen the behavior with Latin and several Indian-subcontinent regional languages, see Latin language generation seems to be censored?
I hope your comment receives more attention from Google than the previous posters did.