Inaccurate failed requests

[yogeek]

Brief summary

When testing this dashboard plugin for a demo, I wanted to start with a kubernetes deployment scaled to 0 (no pod) to show that all requests were "failed" and I was quite surprised to have a "Failed requests per second" always equal to 1/s with a "Request rate" equal to 200/s
(in the "overview" tab as well as in the "timings" tab)

K6 summary showing all requests are failed :

In this case where no server could answer, "Failed requests" should be the same as "Requests rate", shouldn't it ?

k6 version

v0.53.0

xk6-dashboard version

0.7.5

OS

Ubuntu 18.04.6 LTS

Docker version and image (if applicable)

No response

Steps to reproduce the problem

Launch a k6 run on a inexistent site :

cat <<EOF > script.js
import http from 'k6/http';

export const options = {
  scenarios: {
    constant_request_rate: {
      executor: 'constant-arrival-rate',
      rate: 200,
      timeUnit: '1s', // 200 iterations per second, i.e. 200 RPS
      duration: '300s',
      preAllocatedVUs: 100, // how large the initial pool of VUs would be
      maxVUs: 200, // if the preAllocatedVUs are not enough, we can initialize more
    },
  },
};

export default function() {
  http.get('http://nothing.here');
}
EOF

export K6_WEB_DASHBOARD_PORT=8888
export K6_WEB_DASHBOARD_PERIOD="1s"

k6 run --out web-dashboard - <script.js

Open dashboard : http://localhost:888
Check "Failed requests" is always 1/s whereas "HTTP request rate" is around 200/s

Expected behaviour

"Failed requests" should be the same as "Requests rate" if all HTTP requests are failing

Actual behaviour

"Failed requests" is always 1/s whereas "HTTP request rate" is around 200/s