Both retryable_writes_txn_number_validation_reuse.js and retryable_writes_txn_number_validation_order.js force restarts of certain nodes, and then after attempt to run requests through mongos before ensuring mongos has seen the new primary. This can lead to the request failing with FailedToSatisfyReadPreference, because the mongos may not find about the new primary before the targeter times out.