Chromecast volume initiation

Android TV with build in Chromecast
ROON Nucleus

TV is on and has certain TV volume setting

Then I start ROON to play via Chromecast on the TV

The music starts playing at the volume the TV was on, not on the volume of ROON

Only when I use the ROON volume control the volume is immediately reset to the ROON volume level

Maybe a suggestion is that ROON does an initial volume control setting to the Chromecast device when starting to play so the device is in sync with what ROON is displaying as setting.