I’ve been banging my head all morning trying to work out why some of my sources for my TV won’t persist and can’t be invoked using the media_player.select_source service.
I was about to file a bug report and download the diagnostics for the integration when I realised I have to manually include new sources on the integration. I ticked the newly-added sources and everything started working fine.
Please tweak the integration so that new sources can be automatically included by default, and later excluded!