Google Chrome Cast Audio Preview Programme - alert & BEWARE
I have a Chromecast Audio, connecting to my Home Hub 4 (also done this with Home Hub 5 with identical results). I enabled the 'Preview Progamme' which allows you try the next version of the firmware. When setting up the new firmware I discovered my Home Hub had crashed and could only recover a broadband connection by power cycling. I can't apparently do anything to recover the Chromecast which is stuck in the new setup process.
No disaster as I have a spare chrome cast audio which I set up routinely (but on the standard firmware - 1.20.66189).
So, unless someone can point me at a work around - Don't enable the Preview Programme on your Chrome cast Audio devices if connected to those routers.
In my view there should be a high level alert to all BT/Openreach support staff on this matter, especially the field engineers. It is worrying when a wireless connected device cases the router/hub to reboot.
The problem does not occur with the new BT Smart Hub - I upgraded for around £60 with postage, and my hdmi chromecasts and my chromecast audios work fine now.
wireless problems are nothing to do with Openreach field staff as there remit ends at the master phone socket and the phone/broadband network no provider will get involved with third party wireless products