After a long peer review process, our paper about quantum Mpemba effect was finally accepted for publication on PRL. I have to say that the first round of review really helped us improving the quality of the letter. In the current version, we were really able to pinpoint a generic mechanism at the origin of the Mpemba effect in all circuits with a single U(1) conserved quantity. Our theory perfectly agrees with the extensive numerics we performed. Many thanks to my collaborators for this project!