For example, abort_expired_transaction.js is excluded, but run multiple times here:
https://evergreen.mongodb.com/task/mongodb_mongo_master_enterprise_rhel_62_64_bit_flow_control_off_display_logical_session_cache_sharding_100ms_refresh_jscore_txns_passthrough_patch_6923fac12fdf1a1dd1ad313033b8418d69bb29ee_5e7bb6f7d1fe07236b6a99a7_20_03_25_19_55_07##%257B%2522compare%2522%253A%255B%257B%2522hash%2522%253A%25226923fac12fdf1a1dd1ad313033b8418d69bb29ee%2522%257D%255D%257D
Lowering the number from 48 to 10 appears to have worked around the issue