multi_stmt_txn_jscore_passthrough_with_migration is a suite that will cause chunk migrations.  text_covered_matching.js examines explain output, including number of keys examined. In the case of a chunk migration in process, a duplicate index key can exist and therefore the number of keys examined will be larger than the amount expected by the test. Therefore, this test will often run (but not always) incorrectly on this passthrough. To fix this, we simply need to blacklist this test on this passthrough.