diff --git a/CHANGELOG.md b/CHANGELOG.md
index 4b3a3ea873125..0412cc602d65f 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -81,12 +81,13 @@ The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/),
 - Client with Java 8 runtime and Apache HttpClient 5 Transport fails with java.lang.NoSuchMethodError: java.nio.ByteBuffer.flip()Ljava/nio/ByteBuffer ([#13100](https://github.com/opensearch-project/opensearch-java/pull/13100))
 - Fix from and size parameter can be negative when searching ([#13047](https://github.com/opensearch-project/OpenSearch/pull/13047))
 - Enabled mockTelemetryPlugin for IT and fixed OOM issues ([#13054](https://github.com/opensearch-project/OpenSearch/pull/13054))
-- Fix implement mark() and markSupported() in class FilterStreamInput ([#13098](https://github.com/opensearch-project/OpenSearch/pull/13098))
-- Fix IndicesRequestCache Stale calculation ([#13070](https://github.com/opensearch-project/OpenSearch/pull/13070)]
+- Fix implement mark() and markSupported() in class FilterStreamInput[ ([#13098](https://github.com/opensearch-project/OpenSearch/pull/13098))
+- Fix IndicesRequestCache Stale calculation ([#13070](https://github.com/opensearch-project/OpenSearch/pull/13070)]]()
 - Fix snapshot _status API to return correct status for partial snapshots ([#12812](https://github.com/opensearch-project/OpenSearch/pull/12812))
 - Improve the error messages for _stats with closed indices ([#13012](https://github.com/opensearch-project/OpenSearch/pull/13012))
 - Ignore BaseRestHandler unconsumed content check as it's always consumed. ([#13290](https://github.com/opensearch-project/OpenSearch/pull/13290))
 - Fix mapper_parsing_exception when using flat_object fields with names longer than 11 characters ([#13259](https://github.com/opensearch-project/OpenSearch/pull/13259))
+- The aggs result of NestedAggregator with sub NestedAggregator may be not accurately  ([#13324](https://github.com/opensearch-project/OpenSearch/pull/13324))
 
 ### Security
 
diff --git a/server/src/main/java/org/opensearch/search/aggregations/bucket/nested/NestedAggregator.java b/server/src/main/java/org/opensearch/search/aggregations/bucket/nested/NestedAggregator.java
index 20fc8590e09b2..5e291a40d08d5 100644
--- a/server/src/main/java/org/opensearch/search/aggregations/bucket/nested/NestedAggregator.java
+++ b/server/src/main/java/org/opensearch/search/aggregations/bucket/nested/NestedAggregator.java
@@ -143,26 +143,26 @@ public void collect(int parentDoc, long bucket) throws IOException {
     }
 
     static Tuple<Integer, Integer> getChildAndParentId(BitSet parentDocs, DocIdSetIterator childDocs, int parentDoc) throws IOException {
-        int currentRootDoc;
+        int currentParentDoc;
         int prevParentDoc = parentDocs.prevSetBit(parentDoc);
         if (prevParentDoc == -1) {
-            currentRootDoc = parentDocs.nextSetBit(0);
+            currentParentDoc = parentDocs.nextSetBit(0);
         } else if (prevParentDoc == parentDoc) {
-            currentRootDoc = parentDoc;
-            if (currentRootDoc == 0) {
+            currentParentDoc = parentDoc;
+            if (currentParentDoc == 0) {
                 prevParentDoc = -1;
             } else {
-                prevParentDoc = parentDocs.prevSetBit(currentRootDoc - 1);
+                prevParentDoc = parentDocs.prevSetBit(currentParentDoc - 1);
             }
         } else {
-            currentRootDoc = parentDocs.nextSetBit(prevParentDoc + 1);
+            currentParentDoc = parentDocs.nextSetBit(prevParentDoc + 1);
         }
 
         int childDocId = childDocs.docID();
         if (childDocId <= prevParentDoc) {
             childDocId = childDocs.advance(prevParentDoc + 1);
         }
-        return Tuple.tuple(currentRootDoc, childDocId);
+        return Tuple.tuple(currentParentDoc, childDocId);
     }
 
     @Override