diff --git a/components/cdc/src/delegate.rs b/components/cdc/src/delegate.rs
index c220970bf9a..afaa98ff4db 100644
--- a/components/cdc/src/delegate.rs
+++ b/components/cdc/src/delegate.rs
@@ -270,7 +270,7 @@ impl Delegate {
                 "region_id" => self.region_id, "min_ts" => min_ts);
             return;
         }
-        info!("try to advance ts"; "region_id" => self.region_id);
+        info!("try to advance ts"; "region_id" => self.region_id, "min_ts" => min_ts);
         let resolver = self.resolver.as_mut().unwrap();
         let resolved_ts = match resolver.resolve(min_ts) {
             Some(rts) => rts,
diff --git a/components/cdc/src/endpoint.rs b/components/cdc/src/endpoint.rs
index 9ef83292a86..0a76619119a 100644
--- a/components/cdc/src/endpoint.rs
+++ b/components/cdc/src/endpoint.rs
@@ -312,6 +312,9 @@ impl<T: CasualRouter<RocksEngine>> Endpoint<T> {
             }
             if has_failed {
                 self.capture_regions.remove(&region_id);
+                self.connections
+                    .iter_mut()
+                    .for_each(|(_, conn)| conn.unsubscribe(region_id));
             }
         }
     }
@@ -335,6 +338,9 @@ impl<T: CasualRouter<RocksEngine>> Endpoint<T> {
             // Delegate may fail during handling pending batch.
             if delegate.has_failed() {
                 self.capture_regions.remove(&region_id);
+                self.connections
+                    .iter_mut()
+                    .for_each(|(_, conn)| conn.unsubscribe(region_id));
             }
         } else {
             warn!("region not found on region ready (finish building resolver)"; "region_id" => region_id);
diff --git a/components/cdc/tests/failpoints/test_cdc.rs b/components/cdc/tests/failpoints/test_cdc.rs
index 9bb78460be6..01ce2e0b744 100644
--- a/components/cdc/tests/failpoints/test_cdc.rs
+++ b/components/cdc/tests/failpoints/test_cdc.rs
@@ -29,7 +29,7 @@ fn test_failed_pending_batch() {
     req.region_id = region.get_id();
     req.set_region_epoch(region.get_region_epoch().clone());
     let (req_tx, event_feed_wrap, receive_event) = new_event_feed(suite.get_region_cdc_client(1));
-    let _req_tx = req_tx
+    let req_tx = req_tx
         .send((req.clone(), WriteFlags::default()))
         .wait()
         .unwrap();
@@ -61,11 +61,9 @@ fn test_failed_pending_batch() {
 
     // Try to subscribe region again.
     let region = suite.cluster.get_region(b"k0");
-    // Ensure it is old region.
+    // Ensure it is the previous region.
     assert_eq!(req.get_region_id(), region.get_id());
     req.set_region_epoch(region.get_region_epoch().clone());
-    let (req_tx, resp_rx) = suite.get_region_cdc_client(1).event_feed().unwrap();
-    event_feed_wrap.as_ref().replace(Some(resp_rx));
     let _req_tx = req_tx.send((req, WriteFlags::default())).wait().unwrap();
     let mut events = receive_event(false);
     assert_eq!(events.len(), 1, "{:?}", events);
diff --git a/components/cdc/tests/integrations/test_cdc.rs b/components/cdc/tests/integrations/test_cdc.rs
index 14df917bfae..4cc605f393b 100644
--- a/components/cdc/tests/integrations/test_cdc.rs
+++ b/components/cdc/tests/integrations/test_cdc.rs
@@ -523,7 +523,7 @@ fn test_region_split() {
     req.region_id = region.get_id();
     req.set_region_epoch(region.get_region_epoch().clone());
     let (req_tx, event_feed_wrap, receive_event) = new_event_feed(suite.get_region_cdc_client(1));
-    let _req_tx = req_tx
+    let req_tx = req_tx
         .send((req.clone(), WriteFlags::default()))
         .wait()
         .unwrap();
@@ -552,12 +552,9 @@ fn test_region_split() {
     }
     // Try to subscribe region again.
     let region = suite.cluster.get_region(b"k0");
-    // Ensure it is old region.
+    // Ensure it is the previous region.
     assert_eq!(req.get_region_id(), region.get_id());
     req.set_region_epoch(region.get_region_epoch().clone());
-
-    let (req_tx, resp_rx) = suite.get_region_cdc_client(1).event_feed().unwrap();
-    event_feed_wrap.as_ref().replace(Some(resp_rx));
     let _req_tx = req_tx.send((req, WriteFlags::default())).wait().unwrap();
     let mut events = receive_event(false);
     assert_eq!(events.len(), 1);