We're aware of this issue.
Apologies for the inconvenience and please be assured that we're working on this.
In the meantime, rebooting your Chromecast might help fixing the issue. Here's how:
- Make sure your mobile device or tablet is linked to the same account as your Chromecast.
- Open the Google Home app.
- Touch and hold your device's tile.
- At the top right corner, tap Settings Settings More settings More Reboot.