When I view my activity feed, using any browser with zwift website, the units for my rides align with my profile preferences. In this case metric.
When I click on any of my rides to view the details, see the map, graphs, etc the units change to imperial.
This behaviour is not present when viewing rides in ZCA. The ride information is correct and complete so this is not an upload or connection or fit file issue. It is simply that the ride units and values are being displayed in imperial units.
I used the Email Now option to contact support but got Ambassadors instead. One assured me that he had forwarded this to Zwift Support but to date I have not received any confirmation or acknowledgement.