Intermittent FAIL in /url/urlsearchparams-constructor.any.html, /url/urlsearchparams-constructor.any.worker.html

[CYBAI]

{
    "status": "FAIL", 
    "group": "default", 
    "message": "assert_array_equals: property 0, expected \"c\" but got \"a\"", 
    "stack": "@http://web-platform.test:8000/url/urlsearchparams-constructor.any.js:170:13\nTest.prototype.step@http://web-platform.test:8000/resources/testharness.js:1566:20\ntest@http://web-platform.test:8000/resources/testharness.js:544:21\n@http://web-platform.test:8000/url/urlsearchparams-constructor.any.js:166:5\n@http://web-platform.test:8000/url/urlsearchparams-constructor.any.js:160:1\n@http://web-platform.test:8000/url/urlsearchparams-constructor.any.worker.js:8:1\n", 
    "subtest": "Construct with object with two keys", 
    "test": "/url/urlsearchparams-constructor.any.worker.html", 
    "line": 128495, 
    "action": "test_result", 
    "expected": "PASS"
}
{
    "status": "FAIL", 
    "group": "default", 
    "message": "assert_array_equals: property 0, expected \"a\\0b\" but got \"d\u1234\"", 
    "stack": "@http://web-platform.test:8000/url/urlsearchparams-constructor.any.js:170:13\nTest.prototype.step@http://web-platform.test:8000/resources/testharness.js:1566:20\ntest@http://web-platform.test:8000/resources/testharness.js:544:21\n@http://web-platform.test:8000/url/urlsearchparams-constructor.any.js:166:5\n@http://web-platform.test:8000/url/urlsearchparams-constructor.any.js:160:1\n@http://web-platform.test:8000/url/urlsearchparams-constructor.any.worker.js:8:1\n", 
    "subtest": "Construct with object with NULL, non-ASCII, and surrogate keys", 
    "test": "/url/urlsearchparams-constructor.any.worker.html", 
    "line": 128497, 
    "action": "test_result", 
    "expected": "PASS"
}
{
    "status": "FAIL", 
    "group": "default", 
    "message": "assert_array_equals: property 0, expected \"a\\0b\" but got \"d\u1234\"", 
    "stack": "@http://web-platform.test:8000/url/urlsearchparams-constructor.any.js:170:13\nTest.prototype.step@http://web-platform.test:8000/resources/testharness.js:1566:20\ntest@http://web-platform.test:8000/resources/testharness.js:544:21\n@http://web-platform.test:8000/url/urlsearchparams-constructor.any.js:166:5\n@http://web-platform.test:8000/url/urlsearchparams-constructor.any.js:160:1\n", 
    "subtest": "Construct with object with NULL, non-ASCII, and surrogate keys", 
    "test": "/url/urlsearchparams-constructor.any.html", 
    "line": 185202, 
    "action": "test_result", 
    "expected": "PASS"
}