This is basically exactly the same as MDL-75312, but the code that was fixed there got re-written in MDL-72321, with the same missing order-by that was fixed before.

Test: test_get_random_question_summaries_with_limit_and_offset
core_question\externallib_test::test_get_random_question_summaries_with_limit_and_offset
Failed asserting that '128004' matches expected 128001.
/var/www/html/question/tests/externallib_test.php:406
/var/www/html/lib/phpunit/classes/advanced_testcase.php:81