diff --git a/miner-apps/jd-client/src/lib/channel_manager/downstream_message_handler.rs b/miner-apps/jd-client/src/lib/channel_manager/downstream_message_handler.rs
index e0aabb404..dc9f9feb5 100644
--- a/miner-apps/jd-client/src/lib/channel_manager/downstream_message_handler.rs
+++ b/miner-apps/jd-client/src/lib/channel_manager/downstream_message_handler.rs
@@ -531,11 +531,19 @@ impl HandleMiningMessagesFromClientAsync for ChannelManager {
                 };
 
                 downstream.downstream_data.super_safe_lock(|data| {
-                        let mut messages: Vec<RouteMessageTo> = vec![];
-                        let extended_channel_id =
-                            data.channel_id_factory.fetch_add(1, Ordering::Relaxed);
+                    if data.require_std_job {
+                        return Ok(vec![(
+                            downstream_id,
+                            build_error("only-accept-standard-job"),
+                        )
+                        .into()])
+                    }
 
-                        let extranonce_prefix = match channel_manager_data
+                    let mut messages: Vec<RouteMessageTo> = vec![];
+                    let extended_channel_id =
+                        data.channel_id_factory.fetch_add(1, Ordering::Relaxed);
+
+                    let extranonce_prefix = match channel_manager_data
                             .extranonce_allocator
                             .allocate_extended(requested_min_rollable_extranonce_size.into())
                         {
@@ -789,7 +797,7 @@ impl HandleMiningMessagesFromClientAsync for ChannelManager {
                                         _ => "internal-error",
                                     };
                                     if err_code == "internal-error" {
-                                        warn!("Failed to update extended channel {channel_id}");
+                                        warn!("Failed to update standard channel {channel_id}");
                                     } else {
                                         return vec![(downstream_id, build_error(err_code)).into()];
                                     }
@@ -808,6 +816,10 @@ impl HandleMiningMessagesFromClientAsync for ChannelManager {
                             } else if let Some(extended_channel) =
                                 data.extended_channels.get_mut(&channel_id)
                             {
+                                if data.require_std_job {
+                                    return vec![(downstream_id, build_error("invalid-channel-id")).into()];
+                                }
+
                                 let update_channel = extended_channel.update_channel(
                                     new_nominal_hash_rate,
                                     Some(requested_maximum_target),
@@ -815,7 +827,7 @@ impl HandleMiningMessagesFromClientAsync for ChannelManager {
                                 let new_target = extended_channel.get_target();
 
                                 if let Err(e) = update_channel {
-                                    error!(channel_id, ?e, "StandardChannel update failed");
+                                    error!(channel_id, ?e, "ExtendedChannel update failed");
                                     let err_code = match e {
                                         ExtendedChannelError::InvalidNominalHashrate => {
                                             "invalid-nominal-hashrate"
@@ -1197,6 +1209,10 @@ impl HandleMiningMessagesFromClientAsync for ChannelManager {
                 return Err(JDCError::disconnect(JDCErrorKind::LastNewPrevhashNotFound, downstream_id));
             };
             downstream.downstream_data.super_safe_lock(|data| {
+                if data.require_std_job {
+                    return Ok(vec![(downstream_id, build_error("invalid-channel-id")).into()]);
+                }
+
                 let mut messages: Vec<RouteMessageTo> = vec![];
 
                 let Some(extended_channel) = data.extended_channels.get_mut(&channel_id) else {