Intermittent FAIL in pointerevent_pointercapture_in_frame.html?mouse, pointerevent_pointercapture_in_frame.html?touch, /pointerevents/pointerevent_pointercapture_in_frame.html?pen #45536

/pointerevents/pointerevent_pointercapture_in_frame.html?touch
  FAIL Test touchpointer capture in same-origin frame: Pointer down at inner frame and set pointer capture. - assert_true: Timed out waiting for lostpointercapture expected true got false
  FAIL Test touchpointer capture in same-origin frame: Pointer down at inner frame and set pointer capture to outer frame should not capture. - assert_array_equals: Received events: innerFrame received pointerdown,innerFrame received pointermove,innerFrame received pointerup,innerFrame received lostpointercapture lengths differ, expected array ["innerFrame received pointerdown", "innerFrame received pointermove", "innerFrame received pointerup"] length 3, got ["innerFrame received pointerdown", "innerFrame received pointermove", "innerFrame received pointerup", "innerFrame received lostpointercapture"] length 4
run/<@http://web-platform.test:8000/pointerevents/pointerevent_pointercapture_in_frame.html?touch:173:28
async*Test.prototype.step@http://web-platform.test:8000/resources/testharness.js:2869:25
promise_test/tests.promise_tests</<@http://web-platform.test:8000/resources/testharness.js:738:36
promise_test/tests.promise_tests<@http://web-platform.test:8000/resources/testharness.js:737:20

  ▶ OK /pointerevents/pointerevent_pointercapture_in_frame.html?pen
  │   ▶ FAIL [expected PASS] Test penpointer capture in same-origin frame: Pointer down at inner frame and set pointer capture.
  │   └   → assert_true: Timed out waiting for lostpointercapture expected true got false
  │   ▶ FAIL [expected PASS] Test penpointer capture in same-origin frame: Pointer down at inner frame and set pointer capture to outer frame should not capture.
  │   │   → assert_array_equals: Received events: innerFrame received pointerdown,innerFrame received pointermove,innerFrame received pointerup,innerFrame received lostpointercapture lengths differ, expected array ["innerFrame received pointerdown", "innerFrame received pointermove", "innerFrame received pointerup"] length 3, got ["innerFrame received pointerdown", "innerFrame received pointermove", "innerFrame received pointerup", "innerFrame received lostpointercapture"] length 4