diff --git a/source/libs/executor/src/scanoperator.c b/source/libs/executor/src/scanoperator.c
index b1c93104fad0b14975e308184c6e3afc0e09ae85..fcd54767711939e8abced12b5cddc6c36b23c94a 100644
--- a/source/libs/executor/src/scanoperator.c
+++ b/source/libs/executor/src/scanoperator.c
@@ -2120,8 +2120,7 @@ FETCH_NEXT_BLOCK:
       return pInfo->pUpdateRes;
     }
 
-    SSDataBlock*    pBlock = pInfo->pRes;
-    SDataBlockInfo* pBlockInfo = &pBlock->info;
+    SDataBlockInfo* pBlockInfo = &pInfo->pRes->info;
     int32_t         totalBlocks = taosArrayGetSize(pInfo->pBlockLists);
 
   NEXT_SUBMIT_BLK:
@@ -2145,35 +2144,36 @@ FETCH_NEXT_BLOCK:
         }
       }
 
-      blockDataCleanup(pBlock);
+      blockDataCleanup(pInfo->pRes);
 
       while (pAPI->tqReaderFn.tqNextBlockImpl(pInfo->tqReader, id)) {
         SSDataBlock* pRes = NULL;
 
         int32_t code = pAPI->tqReaderFn.tqRetrieveBlock(pInfo->tqReader, &pRes, id);
-        qDebug("retrieve data from submit completed code:%s, rows:%" PRId64 " %s", tstrerror(code), pRes->info.rows,
-               id);
+        qDebug("retrieve data from submit completed code:%s rows:%" PRId64 " %s", tstrerror(code), pRes->info.rows, id);
 
         if (code != TSDB_CODE_SUCCESS || pRes->info.rows == 0) {
           qDebug("retrieve data failed, try next block in submit block, %s", id);
           continue;
         }
 
-        setBlockIntoRes(pInfo, pRes, false);
+        // filter the block extracted from WAL files, according to the time window
+        // apply additional time window filter
+        doBlockDataWindowFilter(pRes, pInfo->primaryTsIndex, &pStreamInfo->fillHistoryWindow, id);
+        blockDataUpdateTsWindow(pInfo->pRes, pInfo->primaryTsIndex);
+        if (pRes->info.rows == 0) {
+          continue;
+        }
 
+        setBlockIntoRes(pInfo, pRes, false);
         if (pInfo->pCreateTbRes->info.rows > 0) {
           pInfo->scanMode = STREAM_SCAN_FROM_RES;
           qDebug("create table res exists, rows:%"PRId64" return from stream scan, %s", pInfo->pCreateTbRes->info.rows, id);
           return pInfo->pCreateTbRes;
         }
 
-        // apply additional time window filter
-        doBlockDataWindowFilter(pBlock, pInfo->primaryTsIndex, &pStreamInfo->fillHistoryWindow, id);
-        pBlock->info.dataLoad = 1;
-        blockDataUpdateTsWindow(pBlock, pInfo->primaryTsIndex);
-
-        doCheckUpdate(pInfo, pBlockInfo->window.ekey, pBlock);
-        doFilter(pBlock, pOperator->exprSupp.pFilterInfo, NULL);
+        doCheckUpdate(pInfo, pBlockInfo->window.ekey, pInfo->pRes);
+        doFilter(pInfo->pRes, pOperator->exprSupp.pFilterInfo, NULL);
 
         int64_t numOfUpdateRes = pInfo->pUpdateDataRes->info.rows;
         qDebug("%s %" PRId64 " rows in datablock, update res:%" PRId64, id, pBlockInfo->rows, numOfUpdateRes);
@@ -2195,7 +2195,7 @@ FETCH_NEXT_BLOCK:
 
     qDebug("stream scan completed, and return source rows:%" PRId64", %s", pBlockInfo->rows, id);
     if (pBlockInfo->rows > 0) {
-      return pBlock;
+      return pInfo->pRes;
     }
 
     if (pInfo->pUpdateDataRes->info.rows > 0) {
diff --git a/source/libs/stream/src/streamRecover.c b/source/libs/stream/src/streamRecover.c
index f9bbe96d9775b5734d92a2d9e878d6b539daa2a5..223e1858006c78defcb534c1137e8ea128cee27f 100644
--- a/source/libs/stream/src/streamRecover.c
+++ b/source/libs/stream/src/streamRecover.c
@@ -80,6 +80,7 @@ int32_t streamTaskLaunchScanHistory(SStreamTask* pTask) {
              walReaderGetCurrentVer(pTask->exec.pWalReader));
     }
   } else if (pTask->info.taskLevel == TASK_LEVEL__AGG) {
+    streamTaskEnablePause(pTask);
     streamSetParamForScanHistory(pTask);
     streamTaskScanHistoryPrepare(pTask);
   } else if (pTask->info.taskLevel == TASK_LEVEL__SINK) {