Run the following test on 3.6: (function() { 'use strict' ; load( 'jstests/replsets/rslib.js' ); const basename = 'initial_sync_visibility' ; jsTestLog( 'Bring up set' ); const rst = new ReplSetTest({name: basename, nodes: 1}); rst.startSet(); rst.initiate(); const primary = rst.getPrimary(); const primaryDB = primary.getDB(basename); assert .commandWorked(primary.adminCommand({setFeatureCompatibilityVersion: "3.4" })); jsTestLog( 'Create a collection' ); assert .writeOK(primaryDB[ 'coll' ].save({_id: "visible" })); jsTestLog( 'Make sure synced' ); rst.awaitReplication(); jsTestLog( 'Activate WT visibility failpoint and write an invisible document' ); assert .commandWorked(primaryDB.adminCommand( {configureFailPoint: 'WTPausePrimaryOplogDurabilityLoop' , mode: 'alwaysOn' })); assert .writeOK(primaryDB[ 'coll' ].save({_id: "invisible" })); jsTestLog( 'Bring up a new node' ); const secondary = rst.add({setParameter: 'numInitialSyncAttempts=3' , binVersion: "last-stable" }); rst.reInitiate(); assert .eq(primary, rst.getPrimary(), 'Primary changed after reconfig' ); jsTestLog( 'Wait for new node to start cloning' ); secondary.setSlaveOk(); const secondaryDB = secondary.getDB(basename); wait(function() { return secondaryDB.stats().collections >= 1; }, 'never saw new node starting to clone, was waiting for collections in: ' + basename); jsTestLog( 'Disable WT visibility failpoint on primary making all visible.' ); assert .commandWorked(primaryDB.adminCommand( {configureFailPoint: 'WTPausePrimaryOplogDurabilityLoop' , mode: 'off' })); jsTestLog( 'Wait for both nodes to be up-to-date' ); rst.awaitSecondaryNodes(); rst.awaitReplication(); jsTestLog( 'Check all OK' ); rst.checkReplicatedDataHashes(); rst.stopSet(15); })();