diff --git a/packages/node_modules/@node-red/nodes/core/sequence/17-split.js b/packages/node_modules/@node-red/nodes/core/sequence/17-split.js
index e359259fc..6e9add270 100644
--- a/packages/node_modules/@node-red/nodes/core/sequence/17-split.js
+++ b/packages/node_modules/@node-red/nodes/core/sequence/17-split.js
@@ -337,6 +337,7 @@ module.exports = function(RED) {
             }
         });
     }
+
     function reduceAndSendGroup(node, group, done) {
         var is_right = node.reduce_right;
         var flag = is_right ? -1 : 1;
@@ -610,6 +611,15 @@ module.exports = function(RED) {
                     return;
                 }
 
+                if (node.mode === 'custom' && msg.hasOwnProperty('parts')) {
+                    if (msg.parts.hasOwnProperty('parts')) {
+                        msg.parts = { parts: msg.parts.parts };
+                    }
+                    else {
+                        delete msg.parts;
+                    }
+                }
+
                 var payloadType;
                 var propertyKey;
                 var targetCount;