diff --git a/backend/src/tasks/lightning/network-sync.service.ts b/backend/src/tasks/lightning/network-sync.service.ts
index aca3dbef8..6785b0e2d 100644
--- a/backend/src/tasks/lightning/network-sync.service.ts
+++ b/backend/src/tasks/lightning/network-sync.service.ts
@@ -269,7 +269,11 @@ class NetworkSyncService {
   }
 
   private async $scanForClosedChannels(): Promise<void> {
-    if (this.closedChannelsScanBlock === blocks.getCurrentBlockHeight()) {
+    let currentBlockHeight = blocks.getCurrentBlockHeight();
+    if (config.MEMPOOL.ENABLED === false) { // https://github.com/mempool/mempool/issues/3582
+      currentBlockHeight = await bitcoinApi.$getBlockHeightTip();
+    }
+    if (this.closedChannelsScanBlock === currentBlockHeight) {
       logger.debug(`We've already scan closed channels for this block, skipping.`);
       return;
     }
@@ -305,7 +309,7 @@ class NetworkSyncService {
         }
       }
 
-      this.closedChannelsScanBlock = blocks.getCurrentBlockHeight();
+      this.closedChannelsScanBlock = currentBlockHeight;
       logger.debug(`Closed channels scan completed at block ${this.closedChannelsScanBlock}`, logger.tags.ln);
     } catch (e) {
       logger.err(`$scanForClosedChannels() error: ${e instanceof Error ? e.message : e}`, logger.tags.ln);
diff --git a/production/mempool-config.mainnet-lightning.json b/production/mempool-config.mainnet-lightning.json
index 21e7109e9..41e42a5bd 100644
--- a/production/mempool-config.mainnet-lightning.json
+++ b/production/mempool-config.mainnet-lightning.json
@@ -1,5 +1,6 @@
 {
   "MEMPOOL": {
+    "ENABLED": false,
     "NETWORK": "mainnet",
     "BACKEND": "esplora",
     "HTTP_PORT": 8993,
diff --git a/production/mempool-config.signet-lightning.json b/production/mempool-config.signet-lightning.json
index 7751d8f0e..9971729e2 100644
--- a/production/mempool-config.signet-lightning.json
+++ b/production/mempool-config.signet-lightning.json
@@ -1,5 +1,6 @@
 {
   "MEMPOOL": {
+    "ENABLED": false,
     "NETWORK": "signet",
     "BACKEND": "esplora",
     "HTTP_PORT": 8991,
diff --git a/production/mempool-config.testnet-lightning.json b/production/mempool-config.testnet-lightning.json
index d8283b779..ff7d4766f 100644
--- a/production/mempool-config.testnet-lightning.json
+++ b/production/mempool-config.testnet-lightning.json
@@ -1,5 +1,6 @@
 {
   "MEMPOOL": {
+    "ENABLED": false,
     "NETWORK": "testnet",
     "BACKEND": "esplora",
     "HTTP_PORT": 8992,