The commit that enabled load balancing support in the reactive streams driver has caused two transaction spec tests of pinning behavior to fail in sharded clusters.

One example: https://evergreen.mongodb.com/task/mongo_java_driver_tests_jdk_secure__version~4.2_os~linux_topology~sharded_cluster_auth~auth_ssl~ssl_jdk~jdk11_test_a82ce71d0aa7da9c6455f1b52ae24ed3cd4c1f62_21_05_24_20_54_09