Smartthings Samsung TV QN95B and Google Home problem

Hello

For over a year I used to control my TV by voice via Google home speakers connected to Smartthings (on/off, volume and channel change) it worked very well until yesterday

Yesterday I had to reset the smarthub of my TV, since the connection between Smartthings and Google home sees the TV as a switch and therefore only allows the TV to be turned on and off.

Does anyone have an idea to solve my problem?

Thanks.