I've been using the Chromecast integration for a while for TTS to a Google Home Mini in a bedroom. I use it for a morning alarm announcement of date and time.
It has been pretty solid, but over the last week I've had a couple of occasions where the pre announcement "bong" comes through but the TTS doesn't follow. It then seems to need to be re-initialised before it will accept any TTS again.
This error appears in the log when this happened this morning.