Fetch API: net::ERR_ABORTED on Chrome

[sogaani]

I met fetch error, if i load gateway page.

api.js:368 GET https://sogaani-test.mozilla-iot.org/settings/experiments/speech net::ERR_ABORTED
getExperimentSetting @ api.js:368
getExperimentSetting @ menu.js:39
init @ menu.js:29
init @ app.js:49
app_onLoad @ app.js:111
load (async)
(anonymous) @ app.js:109

• Server
  Linux: DESKTOP-93GMCH3 4.4.0-43-Microsoft Adapter API #1-Microsoft Wed Dec 31 14:42:53 PST 2014 x86_64 x86_64 x86_64 GNU/Linux
  Node: v8.9.4

• Client
  Windows 10
  Chrome version 65.0.3325.181（Official Build） （64 bit）

I thought that this issue relates ReadableStream.
We do not get body, if getExperimentSetting get 404. And, maybe data left on ReadableStream.

I modify code as follows and it works fine.

    getExperimentSetting: function(experimentName) {
      const headers = {
        Authorization: `Bearer ${window.API.jwt}`,
        Accept: 'application/json',
      };
      return fetch(
        `/settings/experiments/${encodeURIComponent(experimentName)}`, {
          method: 'GET',
          headers: headers,
        })
        .then(function(response) {
          if (!response.ok) {
            // If do not get body, met net::ERR_ABORTED on chrome.

            if (response.body && response.body.cancel) {
              response.body.cancel();
            }
            throw new Error(`Error getting ${experimentName}`);
          }

          return response.json()
            .then(function(json) {
              return json.enabled;
            }).catch(function(e) {
              throw new Error(`Error getting ${experimentName} ${e}`);
            });
        });
    },

We can fix this error, but I'm not sure if this error will do something bad.