diff --git a/source/libs/executor/src/timewindowoperator.c b/source/libs/executor/src/timewindowoperator.c
index fc78f8a20dd6c13fcc30462ba511f7ec6f9d9c24..1ec7d6d26bd9409675b3579f0c210cc11e9c598a 100644
--- a/source/libs/executor/src/timewindowoperator.c
+++ b/source/libs/executor/src/timewindowoperator.c
@@ -2703,6 +2703,7 @@ static void rebuildIntervalWindow(SOperatorInfo* pOperator, SArray* pWinArray, S
                    pChildSup->rowEntryInfoOffset, &pChInfo->aggSup);
       updateTimeWindowInfo(&pInfo->twAggSup.timeWindowData, &parentWin, true);
       compactFunctions(pSup->pCtx, pChildSup->pCtx, numOfOutput, pTaskInfo, &pInfo->twAggSup.timeWindowData);
+      releaseOutputBuf(pChInfo->pState, pWinRes, pChResult);
     }
     if (num > 0 && pUpdatedMap) {
       saveWinResultInfo(pCurResult->win.skey, pWinRes->groupId, pUpdatedMap);