What are your main sources Obsydian?
I've been almost exclusively playing stuff from Qobuz, often via Chromecast on the iPhone - Qobuz updated their app prior to the update and I'm seeing issues with that - it's now providing artwork for the Nova which it didn't before. Basically many Qobuz tracks seem to play 2-3 secs then restart now which they didn't before, but this started before the firmware update and audio still sounded fine apart from the steraming glitches. The new Qobuz app also seems to restart the curently playing track if the I wake the display and go to the app or switch back from another app to the Qobuz one - did not happen before. Could Qobuz stream quality have got worse with their changes to implement metadata/artwork features?
If the Nova is just handed the address to fetch and play the Qobuz stream via Chromecast rather than the audio itself, why should the Nova be behaving differently and restarting - has the Nova's Chromecast code changed too - I think not as the glitches started a day or two before I updated, just considering other possibilities.
I have another iPhone with the older Qobuz app version on it so will check to see if that still works without glitches (or album artwork!).