diff --git a/backend/src/core/blockchain/blockchain.service.ts b/backend/src/core/blockchain/blockchain.service.ts
index 86bc882d..6ff3ac60 100644
--- a/backend/src/core/blockchain/blockchain.service.ts
+++ b/backend/src/core/blockchain/blockchain.service.ts
@@ -37,6 +37,10 @@ export class BlockchainService {
     private chainPromise: Promise<Chain | null>,
   ) {
     this.createConnection();
+
+    process.on('exit', () => {
+      this.close();
+    });
   }
 
   private createConnection() {
@@ -211,9 +215,7 @@ export class BlockchainService {
   ): Promise<Block> {
     await this.websocketReady;
     this.logger.debug(`get_block_by_number - blockNumber: ${blockNumber}`);
-    const response = await this.call('get_block_by_number', [
-      BI.from(blockNumber).toHexString(),
-    ]);
+    const response = await this.call('get_block_by_number', [BI.from(blockNumber).toHexString()]);
     const block = response as Block;
     if (!withTxData) {
       block.transactions = block.transactions.map((tx) => {
diff --git a/backend/src/core/indexer/flow/assets.flow.ts b/backend/src/core/indexer/flow/assets.flow.ts
index 8dae2c7f..b2ce52da 100644
--- a/backend/src/core/indexer/flow/assets.flow.ts
+++ b/backend/src/core/indexer/flow/assets.flow.ts
@@ -36,8 +36,8 @@ export class IndexerAssetsFlow extends EventEmitter {
         CKB_ONE_DAY_BLOCKS
       ) {
         this.logger.log(`Latest asset is near tip block number, skip indexing assets...`);
-        this.startBlockAssetsIndexing();
         this.setupBlockAssetsIndexedListener();
+        this.startBlockAssetsIndexing();
         return;
       }
     }
@@ -79,8 +79,8 @@ export class IndexerAssetsFlow extends EventEmitter {
       this.logger.log(`Asset type ${assetType.codeHash} indexed`);
       if (completed === totalAssetTypes) {
         this.off(IndexerAssetsEvent.AssetIndexed, onAssetIndexed);
-        this.startBlockAssetsIndexing();
         this.setupBlockAssetsIndexedListener();
+        this.startBlockAssetsIndexing();
       }
     };
     this.on(IndexerAssetsEvent.AssetIndexed, onAssetIndexed);
@@ -102,6 +102,7 @@ export class IndexerAssetsFlow extends EventEmitter {
     }
     const targetBlockNumber = tipBlockNumber - CKB_MIN_SAFE_CONFIRMATIONS;
     if (targetBlockNumber <= latestIndexedBlockNumber) {
+      this.logger.log(`Block assets are up to date, latest indexed block number: ${latestIndexedBlockNumber}`);
       this.emit(IndexerAssetsEvent.BlockAssetsIndexed, latestIndexedBlockNumber);
       return;
     }
@@ -114,8 +115,9 @@ export class IndexerAssetsFlow extends EventEmitter {
   }
 
   private setupBlockAssetsIndexedListener() {
+    const cronJobName = `indexer-block-assets-${this.chain.id}-${process.pid}`;
     this.on(IndexerAssetsEvent.BlockAssetsIndexed, () => {
-      if (this.schedulerRegistry.doesExist('cron', 'indexer-block-assets')) {
+      if (this.schedulerRegistry.doesExist('cron', cronJobName)) {
         return;
       }
 
@@ -123,7 +125,7 @@ export class IndexerAssetsFlow extends EventEmitter {
       const job = new CronJob(CronExpression.EVERY_10_SECONDS, () => {
         this.startBlockAssetsIndexing();
       });
-      this.schedulerRegistry.addCronJob('indexer-block-assets', job);
+      this.schedulerRegistry.addCronJob(cronJobName, job);
       job.start();
     });
   }
diff --git a/backend/src/core/indexer/flow/transactions.flow.ts b/backend/src/core/indexer/flow/transactions.flow.ts
index d2698b6c..59dda498 100644
--- a/backend/src/core/indexer/flow/transactions.flow.ts
+++ b/backend/src/core/indexer/flow/transactions.flow.ts
@@ -29,8 +29,8 @@ export class IndexerTransactionsFlow extends EventEmitter {
   }
 
   public async start() {
-    this.startBlockIndexing();
     this.setupBlockIndexedListener();
+    this.startBlockIndexing();
   }
 
   public async startBlockIndexing() {
@@ -59,8 +59,9 @@ export class IndexerTransactionsFlow extends EventEmitter {
   }
 
   private setupBlockIndexedListener() {
+    const cronJobName = `indexer-transactions-${this.chain.id}-${process.pid}`;
     this.on(IndexerTransactionsEvent.BlockIndexed, () => {
-      if (this.schedulerRegistry.doesExist('cron', 'indexer-transactions')) {
+      if (this.schedulerRegistry.doesExist('cron', cronJobName)) {
         return;
       }
 
@@ -68,7 +69,7 @@ export class IndexerTransactionsFlow extends EventEmitter {
       const job = new CronJob(CronExpression.EVERY_10_SECONDS, () => {
         this.startBlockIndexing();
       });
-      this.schedulerRegistry.addCronJob('indexer-transactions', job);
+      this.schedulerRegistry.addCronJob(cronJobName, job);
       job.start();
     });
   }
diff --git a/backend/src/core/indexer/indexer.health.ts b/backend/src/core/indexer/indexer.health.ts
index ac27f98a..923a9db0 100644
--- a/backend/src/core/indexer/indexer.health.ts
+++ b/backend/src/core/indexer/indexer.health.ts
@@ -61,15 +61,17 @@ export class IndexerHealthIndicator extends HealthIndicator {
     const tipBlockNumber = await blockchainService.getTipBlockNumber();
     const targetBlockNumber = tipBlockNumber - CKB_MIN_SAFE_CONFIRMATIONS;
 
-    let currentBlockNumber = await this.indexerQueueService.getLatestIndexedAssetsBlock(CKB_CHAIN_ID);
-    if (!currentBlockNumber) {
-      const latestAsset = await this.prismaService.asset.findFirst({
-        select: { blockNumber: true },
-        where: { chainId: CKB_CHAIN_ID },
-        orderBy: { blockNumber: 'desc' },
-      });
-      currentBlockNumber = latestAsset?.blockNumber;
-    }
+    const latestIndexedAssetsBlock =
+      await this.indexerQueueService.getLatestIndexedAssetsBlock(CKB_CHAIN_ID);
+    const latestAsset = await this.prismaService.asset.findFirst({
+      select: { blockNumber: true },
+      where: { chainId: CKB_CHAIN_ID },
+      orderBy: { blockNumber: 'desc' },
+    });
+    const currentBlockNumber = Math.max(
+      latestIndexedAssetsBlock ?? -1,
+      latestAsset?.blockNumber ?? -1,
+    );
 
     const isHealthy =
       !!currentBlockNumber && currentBlockNumber >= targetBlockNumber - INDEEXR_HEALTH_THRESHOLD;
diff --git a/backend/src/filters/all-exceptions.filter.ts b/backend/src/filters/all-exceptions.filter.ts
index 309a7b08..8456679d 100644
--- a/backend/src/filters/all-exceptions.filter.ts
+++ b/backend/src/filters/all-exceptions.filter.ts
@@ -16,8 +16,12 @@ export class AllExceptionsFilter extends SentryGlobalGraphQLFilter {
       const ctx = host.switchToHttp();
       const request = ctx.getRequest();
       if (SKIP_REQUEST_URLS.includes(request.url)) {
-        const response = (exception as HttpException).getResponse();
-        this.httpAdapterHost.httpAdapter.reply(ctx.getResponse(), response, 200);
+        const response = (exception as HttpException)?.getResponse();
+        if (response) {
+          this.httpAdapterHost.httpAdapter.reply(ctx.getResponse(), response, 200);
+          return;
+        }
+        this.httpAdapterHost.httpAdapter.reply(ctx.getResponse(), exception, 500);
         return;
       }
     }