Intermittent fail in /html/webappapis/dynamic-markup-insertion/opening-the-input-stream/reload.window.html

[jdm]

  ▶ Unexpected subtest result in /html/webappapis/dynamic-markup-insertion/opening-the-input-stream/reload.window.html:
  │ FAIL [expected PASS] Reloading a document.open()'d page should reload the URL of the entry realm's responsible document
  │   → assert_true: precondition expected true got false
  │ 
  │ @http://web-platform.test:8000/html/webappapis/dynamic-markup-insertion/opening-the-input-stream/reload.window.js:32:9
  │ Test.prototype.step_timeout/<@http://web-platform.test:8000/resources/testharness.js:1611:20
  │ Test.prototype.step@http://web-platform.test:8000/resources/testharness.js:1553:20
  └ Test.prototype.step_func/<@http://web-platform.test:8000/resources/testharness.js:1577:20