Metrics chart don't update when switching to new proxy instance

Yesterday I added a second proxy instance to Pilot, it showed up as expected in the Infra overview:

But when looking at the metrics I only see charts for one of the proxies (the first one, called p2w1 above). No matter how I switch to the other (sm1) instance I am still only presented with the p2w1 chart.

I made a point of having very different traffic patterns on the two proxies, so I could identify which is which. Still both show up exactly the same in the Pilot dashboard.
Tried restarting browsers etc - no luck.

Movie showing the whole thing found here.

Some additional context:

When I access the pilot screen from one of my proxy instances dashboard, the correct data is shown.
The issue only seem to occur when looking at charts on pilot.traefik.io.