Some tests got setup error: ConnectionRefusedError: [Errno 111] Connection refused when we ran ./mach try wd.

Weirdly, find_element/find.py always get this error in the CI. I think this error never happened when we ran the same WebDriver test in local (even when we ran the whole webdriver/tests/classic).

Example Try: https://github.com/PotatoCP/servo/actions/runs/16458999006, check the flaky result.

To reproduce in local: ./mach test-wpt -r --product servodriver ./tests/wpt/tests/webdriver/tests/classic/{execute_script/node.py,find_element/find.py} --processes 1