Sony TV was showing up in Google Home as a TV for a while

Did anyone else get this?

My TV is exposed to Google Assistant from HA. For a few days last week it was showing up in the Google Home app and Nest Hub as a TV with volume and channel input controls. Now it’s gone back to being just a switch with on/off only.

I had assumed it was somehow related to Google now supporting TVs and STBs as device categories:
https://www.androidcentral.com/google-assistant-support-comes-tvs-and-set-top-boxes.

I have an older (non Andorid) Sony Bravia TV which I am happily controlling via HA.