Sometimes I review papers that require more than one round of referee reports (e.g., first round was a "major revision", second round a "minor revision", and ultimately acceptance in third round). When listing the referee activity in my CV, I count these set of referee reports written for the same manuscript and the same journal as a single peer review. I believe that this was the common practice.
However, since the raise of services like Publons that allow to credit each individual referee report that is carried out by a reviewer, I wonder if researchers now tend to emphasize more the number of referee reports in the CV rather than the number of peer reviews (somehow giving an impression of a higher peer reviewing activity).
My question: is the common practice nowadays to list in the CV the number of peer reviews or the referee reports?