Incorrect request duration when using WS

Hi, I like the idea of pilot, would be great to see more inside metrics, I believe even in 1.x versions of traefik we had visibility on number of error requests, and the list of those requests would be great to see it in 2.x version or in the pilot.

And the issue I'm having actually also was on health page with 1.x version.
Basically in all projects I have without webSocket, request duration is detected correctly.
But any project with WS, and my ~request duration is almost a minute which is of corse incorrect, but I guess it counts live connection from WS in this metric, I think it would be best to completely exclude WS requests from this metric.