Multiple errors in flaky test maptest_area_contents

[github-actions]

Flaky tests were detected in this test run. This means that there was a failure that was cleared when the tests were simply restarted.
Failures:

maptest_area_contents: Found a turf /turf/open/space/openspace inside /area/space that is NOT stored in any area's turf listing at code/modules/unit_tests/area_contents.dm:35
maptest_area_contents: Found a turf /turf/open/space/openspace inside /area/space that is NOT stored in any area's turf listing at code/modules/unit_tests/area_contents.dm:35
maptest_area_contents: Found a turf /turf/open/space/openspace inside /area/space that is NOT stored in any area's turf listing at code/modules/unit_tests/area_contents.dm:35
maptest_area_contents: Found a turf /turf/open/space/openspace inside /area/space that is NOT stored in any area's turf listing at code/modules/unit_tests/area_contents.dm:35
maptest_area_contents: Found a turf /turf/open/space/openspace inside /area/space that is NOT stored in any area's turf listing at code/modules/unit_tests/area_contents.dm:35
maptest_area_contents: Found a turf /turf/open/space/openspace inside /area/space that is NOT stored in any area's turf listing at code/modules/unit_tests/area_contents.dm:35
maptest_area_contents: Found a turf /turf/open/space/openspace inside /area/space that is NOT stored in any area's turf listing at code/modules/unit_tests/area_contents.dm:35
maptest_area_contents: Found a turf /turf/open/space/openspace inside /area/space that is NOT stored in any area's turf listing at code/modules/unit_tests/area_contents.dm:35
maptest_area_contents: Found a turf /turf/open/space/openspace inside /area/space that is NOT stored in any area's turf listing at code/modules/unit_tests/area_contents.dm:35
maptest_area_contents: Found a turf /turf/open/space/openspace inside /area/space that is NOT stored in any area's turf listing at code/modules/unit_tests/area_contents.dm:35
maptest_area_contents: Found a turf /turf/open/space/openspace inside /area/space that is NOT stored in any area's turf listing at code/modules/unit_tests/area_contents.dm:35
maptest_area_contents: Found a turf /turf/open/space/openspace inside /area/space that is NOT stored in any area's turf listing at code/modules/unit_tests/area_contents.dm:35