This message was generated on an offline device. Indeed this device was never connected to the internet. It was shared from its local relay to my local relay via Bluetooth (and Negentorpy) I were able to recover it with Amethyst and broadcast it to my online relays. Everything thanks to @Samiz 🥳 I think I'm getting closer to an alpha version

Somehow reminded me instantly of a galvanic isolation...

Galvanic isolation - Wikipedia