Hi your CPU usage observations prior to/during stoppages closely match my description here Very regular 2-minute drop outs / need manual restart. As a data point I also use Qobuz and my database has been complete/stable for a loooong time (so it is and wasn’t building the initial database).
Sadly the problem reoccurred since yesterday, so I’m back to monitoring the vitals for a while… (see 2 minute drop outs and resource leaks are back)