Intermittent failure in /html/rendering/non-replaced-elements/the-page/body-margin-2h.html and /html/rendering/non-replaced-elements/the-page/body-margin-2g.html

[jdm]

{
    "status": "FAIL", 
    "group": "default", 
    "message": "/html/rendering/non-replaced-elements/the-page/body-margin-2h.html af200e6a7a25de34764c3c81545a45b8a653164d\n/html/rendering/non-replaced-elements/the-page/body-margin-2-ref.html c6b5a3da221b509f2d035e9a02af1d991540f21d", 
    "stack": null, 
    "subtest": null, 
    "test": "/html/rendering/non-replaced-elements/the-page/body-margin-2h.html", 
    "line": 40937, 
    "action": "test_result", 
    "expected": "PASS"
}
{
    "status": "FAIL", 
    "group": "default", 
    "message": "/html/rendering/non-replaced-elements/the-page/body-margin-2g.html af200e6a7a25de34764c3c81545a45b8a653164d\n/html/rendering/non-replaced-elements/the-page/body-margin-2-ref.html c6b5a3da221b509f2d035e9a02af1d991540f21d", 
    "stack": null, 
    "subtest": null, 
    "test": "/html/rendering/non-replaced-elements/the-page/body-margin-2g.html", 
    "line": 49585, 
    "action": "test_result", 
    "expected": "PASS"
}

Reference:

Actual: