diff --git a/docs/RELEASE-NOTES.md b/docs/RELEASE-NOTES.md
index 4f6b62c..472c11f 100644
--- a/docs/RELEASE-NOTES.md
+++ b/docs/RELEASE-NOTES.md
@@ -4,6 +4,9 @@
 
 ## [Unreleased]
 
+### 수정
+- queryWithCache 단일 소스(DB/캐시) 응답 소실 버그 수정 — mergeTracksByVessel() 참조 공유 시 allTracks.clear()로 결과 파괴
+
 ## [2026-03-09]
 
 ### 변경
diff --git a/src/main/java/gc/mda/signal_batch/domain/gis/service/GisServiceV2.java b/src/main/java/gc/mda/signal_batch/domain/gis/service/GisServiceV2.java
index 1d0ac4f..7f3dd29 100644
--- a/src/main/java/gc/mda/signal_batch/domain/gis/service/GisServiceV2.java
+++ b/src/main/java/gc/mda/signal_batch/domain/gis/service/GisServiceV2.java
@@ -472,7 +472,6 @@ public class GisServiceV2 {
 
         // 4. 동일 선박 병합 (캐시 + DB 결과)
         List<CompactVesselTrack> merged = mergeTracksByVessel(allTracks);
-        allTracks.clear();
 
         return merged;
     }