The "auto_generate_phrase_queries": true, term is missing for four EntitySearchElasticFulltextTest unit test results; it was removed in T219267, but not in the duplicates in WikibaseCirrusSearch and when that became the only copy it started erroring.
Example: https://integration.wikimedia.org/ci/job/quibble-vendor-mysql-hhvm-docker/45288/consoleFull