diff --git a/web/src/hooks/use-send-message.ts b/web/src/hooks/use-send-message.ts
index a5c635575..3be9eab32 100644
--- a/web/src/hooks/use-send-message.ts
+++ b/web/src/hooks/use-send-message.ts
@@ -1,3 +1,4 @@
+import message from '@/components/ui/message';
 import { Authorization } from '@/constants/authorization';
 import { IReferenceObject } from '@/interfaces/database/chat';
 import { BeginQuery } from '@/pages/agent/interface';
@@ -136,6 +137,9 @@ export const useSendMessageBySSE = (url: string = api.completeConversation) => {
               const val = JSON.parse(value?.data || '');
 
               console.info('data:', val);
+              if (val.code === 500) {
+                message.error(val.message);
+              }
 
               setAnswerList((list) => {
                 const nextList = [...list];
diff --git a/web/src/pages/agent/canvas/index.tsx b/web/src/pages/agent/canvas/index.tsx
index 95cd4a0ab..d7186eae7 100644
--- a/web/src/pages/agent/canvas/index.tsx
+++ b/web/src/pages/agent/canvas/index.tsx
@@ -32,7 +32,11 @@ import { useAddNode } from '../hooks/use-add-node';
 import { useBeforeDelete } from '../hooks/use-before-delete';
 import { useCacheChatLog } from '../hooks/use-cache-chat-log';
 import { useMoveNote } from '../hooks/use-move-note';
-import { useShowDrawer, useShowLogSheet } from '../hooks/use-show-drawer';
+import {
+  useHideFormSheetOnNodeDeletion,
+  useShowDrawer,
+  useShowLogSheet,
+} from '../hooks/use-show-drawer';
 import { LogSheet } from '../log-sheet';
 import RunSheet from '../run-sheet';
 import { ButtonEdge } from './edge';
@@ -160,6 +164,9 @@ function AgentCanvas({ drawerVisible, hideDrawer }: IProps) {
       setLastSendLoading(false);
     }
   };
+
+  useHideFormSheetOnNodeDeletion({ hideFormDrawer });
+
   return (
     <div className={styles.canvasWrapper}>
       <svg
diff --git a/web/src/pages/agent/canvas/node/begin-node.tsx b/web/src/pages/agent/canvas/node/begin-node.tsx
index eacc3e4bd..be80d56ae 100644
--- a/web/src/pages/agent/canvas/node/begin-node.tsx
+++ b/web/src/pages/agent/canvas/node/begin-node.tsx
@@ -33,7 +33,7 @@ function InnerBeginNode({ data, id, selected }: NodeProps<IBeginNode>) {
         id={NodeHandleId.Start}
       ></CommonHandle>
 
-      <section className="flex items-center justify-center gap-2">
+      <section className="flex items-center  gap-2">
         <OperatorIcon name={data.label as Operator}></OperatorIcon>
         <div className="truncate text-center font-semibold text-sm">
           {t(`flow.begin`)}
diff --git a/web/src/pages/agent/canvas/node/note-node/index.tsx b/web/src/pages/agent/canvas/node/note-node/index.tsx
index a3f568864..44b073f8f 100644
--- a/web/src/pages/agent/canvas/node/note-node/index.tsx
+++ b/web/src/pages/agent/canvas/node/note-node/index.tsx
@@ -56,7 +56,7 @@ function NoteNode({ data, id, selected }: NodeProps<INoteNode>) {
       <section className="px-1 py-2 flex gap-2 bg-background-highlight items-center note-drag-handle rounded-s-md">
         <NotebookPen className="size-4" />
         <Form {...nameForm}>
-          <form>
+          <form className="flex-1">
             <FormField
               control={nameForm.control}
               name="name"
diff --git a/web/src/pages/agent/chat/box.tsx b/web/src/pages/agent/chat/box.tsx
index 8a25c12a1..2e2010fc5 100644
--- a/web/src/pages/agent/chat/box.tsx
+++ b/web/src/pages/agent/chat/box.tsx
@@ -16,13 +16,13 @@ import { useFetchUserInfo } from '@/hooks/user-setting-hooks';
 import { Message } from '@/interfaces/database/chat';
 import { buildMessageUuidWithRole } from '@/utils/chat';
 import { get } from 'lodash';
-import { useCallback } from 'react';
+import { memo, useCallback } from 'react';
 import { useParams } from 'umi';
 import DebugContent from '../debug-content';
 import { BeginQuery } from '../interface';
 import { buildBeginQueryWithObject } from '../utils';
 
-const AgentChatBox = () => {
+function AgentChatBox() {
   const {
     value,
     ref,
@@ -117,7 +117,7 @@ const AgentChatBox = () => {
             })}
             {/* </Spin> */}
           </div>
-          <div ref={ref} />
+          <div ref={ref.scrollRef} />
         </div>
         <NextMessageInput
           value={value}
@@ -140,6 +140,6 @@ const AgentChatBox = () => {
       ></PdfDrawer>
     </>
   );
-};
+}
 
-export default AgentChatBox;
+export default memo(AgentChatBox);
diff --git a/web/src/pages/agent/chat/use-send-agent-message.ts b/web/src/pages/agent/chat/use-send-agent-message.ts
index 0a8a045aa..27dead043 100644
--- a/web/src/pages/agent/chat/use-send-agent-message.ts
+++ b/web/src/pages/agent/chat/use-send-agent-message.ts
@@ -235,18 +235,23 @@ export const useSendAgentMessage = (
 
         params.session_id = sessionId;
       }
-      const res = await send(params);
 
-      clearUploadResponseList();
+      try {
+        const res = await send(params);
 
-      if (receiveMessageError(res)) {
-        sonnerMessage.error(res?.data?.message);
+        clearUploadResponseList();
 
-        // cancel loading
-        setValue(message.content);
-        removeLatestMessage();
-      } else {
-        // refetch(); // pull the message list after sending the message successfully
+        if (receiveMessageError(res)) {
+          sonnerMessage.error(res?.data?.message);
+
+          // cancel loading
+          setValue(message.content);
+          removeLatestMessage();
+        } else {
+          // refetch(); // pull the message list after sending the message successfully
+        }
+      } catch (error) {
+        console.log('🚀 ~ useSendAgentMessage ~ error:', error);
       }
     },
     [
diff --git a/web/src/pages/agent/hooks/use-show-drawer.tsx b/web/src/pages/agent/hooks/use-show-drawer.tsx
index 268697ed6..7eae28e38 100644
--- a/web/src/pages/agent/hooks/use-show-drawer.tsx
+++ b/web/src/pages/agent/hooks/use-show-drawer.tsx
@@ -167,3 +167,15 @@ export function useShowLogSheet({
     showLogSheet: handleShow,
   };
 }
+
+export function useHideFormSheetOnNodeDeletion({
+  hideFormDrawer,
+}: Pick<ReturnType<typeof useShowFormDrawer>, 'hideFormDrawer'>) {
+  const { nodes, clickedNodeId } = useGraphStore((state) => state);
+
+  useEffect(() => {
+    if (!nodes.some((x) => x.id === clickedNodeId)) {
+      hideFormDrawer();
+    }
+  }, [clickedNodeId, hideFormDrawer, nodes]);
+}
diff --git a/web/src/pages/agent/operator-icon.tsx b/web/src/pages/agent/operator-icon.tsx
index 74127ff2b..00fdd6e0a 100644
--- a/web/src/pages/agent/operator-icon.tsx
+++ b/web/src/pages/agent/operator-icon.tsx
@@ -1,7 +1,7 @@
 import { IconFont } from '@/components/icon-font';
 import SvgIcon from '@/components/svg-icon';
 import { cn } from '@/lib/utils';
-import { CirclePlay } from 'lucide-react';
+import { HousePlus } from 'lucide-react';
 import { Operator } from './constant';
 
 interface IProps {
@@ -11,7 +11,7 @@ interface IProps {
 
 export const OperatorIconMap = {
   [Operator.Retrieval]: 'KR',
-  [Operator.Begin]: CirclePlay,
+  [Operator.Begin]: 'house-plus',
   [Operator.Categorize]: 'a-QuestionClassification',
   [Operator.Message]: 'reply',
   [Operator.Iteration]: 'loop',
@@ -49,6 +49,14 @@ const Empty = () => {
 const OperatorIcon = ({ name, className }: IProps) => {
   const Icon = OperatorIconMap[name as keyof typeof OperatorIconMap] || Empty;
 
+  if (name === Operator.Begin) {
+    return (
+      <div className="inline-block p-1 bg-background-checked rounded-sm">
+        <HousePlus className="rounded size-3" />
+      </div>
+    );
+  }
+
   if (name in SVGIconMap) {
     return (
       <SvgIcon