I tried rebooting the Homey and reload the Chromecast app within Homey on way to many occasions. Sometimes it works sometime it doesn’t.
Came across a text on Googles support page:The Cast team is aware of an issue with the Android Cast Screen / Audio feature where the ‘Disconnect’ button within the Google Home app remains after successfully disconnecting the mirroring session. You’re unable to reconnect a Chromecast or Chromcast Audio using the Cast Screen / Audio feature.
Not sure if this is what’s causing the issue but it sounds quite familiar. I also realised my chromecast audio are made for the US market. Not sure if that is affecting the connection (but doubt it since it works every now and then and then stop working for a few hours).
For now I think I leave it for a few days, think I need some distance to the problem to figure it out. Already have a few backupoptions like getting a HDMI-AUX-adapter and use an ordinary chromecast or rebuild a google home mini to get an aux output (found some interesting stuff on the Internet).
Thanks for all your help and suggestion, if you or anybody else have some input that would be great. If I ever figure it out I will post it here.
Rgds/J