Displaying lyrics on a Sony Android tv

I have Roon Core installed on a Mac, with my Lyngdorf TDAI 1120 as the main output. I used to be able to display the lyrics simultaneously on my Tv, but this has now stopped working. I have tried all the advice I can find on the web, but nothing works. I haven’t changed my Roon setup, so am at a loss what to try next, so any suggestions welcome.

Potentially an issue that has been reported by several users, without any resolution from Roon.

Any chance your Sony Android TV is a 2015 Bravia?

It’s a 2020 Bravia.