Good news: RP is now streaming FLAC with metadata! Big up to them for changing their infrastructure to Rocket Server to allow that!
BUT: there is something in Roon’s infrastructure (not handling well radios with https streams…) that required a temporary workaround , all praise @BrianW,
So it’s possible FLAC Metadata breaks again until Roon team fixes our Roon Cores with a better handling of https streams.
I have anyway shut down my service for now. Service stays on for FIP stations as there’s no workaround so far.