diff --git a/_raw/locales/en/messages.json b/_raw/locales/en/messages.json
index e6133986254..9764765dcc8 100644
--- a/_raw/locales/en/messages.json
+++ b/_raw/locales/en/messages.json
@@ -72,6 +72,11 @@
       "enoughSafeSigCollected": "Enough signature collected",
       "moreSafeSigNeeded": "{{0}} more confirmation needed",
       "safeAdminSigned": "Signed",
+      "customRPCErrorModal": {
+        "title": "Custom RPC Error",
+        "content": "Your custom RPC is unavailable now. You can disable it and continue signing using Rabby's official RPC",
+        "button": "Disable Custom RPC"
+      },
       "swap": {
         "title": "Swap Token",
         "payToken": "Pay",
@@ -2110,4 +2115,4 @@
     },
     "IMPORTED_HD_KEYRING_NEED_PASSPHRASE": "Imported by Seed Phrase (Passphrase)"
   }
-}
+}
\ No newline at end of file
diff --git a/src/ui/style/antd-overwrite.less b/src/ui/style/antd-overwrite.less
index a7491f6ec78..d8109f8e014 100644
--- a/src/ui/style/antd-overwrite.less
+++ b/src/ui/style/antd-overwrite.less
@@ -205,7 +205,7 @@
     justify-content: space-between;
     width: 100%;
     .ant-btn {
-      width: 144px;
+      min-width: 144px;
       font-size: 15px;
       font-weight: 500;
       height: 44px;
diff --git a/src/ui/utils/hooks.ts b/src/ui/utils/hooks.ts
index 3833d3d3a65..7fc1cee3095 100644
--- a/src/ui/utils/hooks.ts
+++ b/src/ui/utils/hooks.ts
@@ -52,16 +52,6 @@ export const useApproval = () => {
       history.push('/');
     }
   };
-
-  useEffect(() => {
-    if (!getUiType().isNotification) {
-      return;
-    }
-    window.addEventListener('beforeunload', rejectApproval);
-
-    return () => window.removeEventListener('beforeunload', rejectApproval);
-  }, []);
-
   return [getApproval, resolveApproval, rejectApproval] as const;
 };
 
diff --git a/src/ui/views/Approval/components/SignTx.tsx b/src/ui/views/Approval/components/SignTx.tsx
index 78d1e58360d..5e26829fd23 100644
--- a/src/ui/views/Approval/components/SignTx.tsx
+++ b/src/ui/views/Approval/components/SignTx.tsx
@@ -52,7 +52,6 @@ import GasSelector, { GasSelectorResponse } from './TxComponents/GasSelecter';
 import GnosisDrawer from './TxComponents/GnosisDrawer';
 import Loading from './TxComponents/Loading';
 import { useLedgerDeviceConnected } from '@/ui/utils/ledger';
-import { TransactionGroup } from 'background/service/transactionHistory';
 import { intToHex } from 'ui/utils/number';
 import { calcMaxPriorityFee } from '@/utils/transaction';
 import { FooterBar } from './FooterBar/FooterBar';
@@ -62,7 +61,6 @@ import {
   fetchActionRequiredData,
   ActionRequireData,
   formatSecurityEngineCtx,
-  getActionTypeText,
 } from '../components/Actions/utils';
 import Actions from './Actions';
 import { useSecurityEngine } from 'ui/utils/securityEngine';
@@ -778,6 +776,23 @@ const SignTx = ({ params, origin }: SignTxProps) => {
     }
   };
 
+  const triggerCustomRPCErrorModal = () => {
+    Modal.error({
+      className: 'modal-support-darkmode',
+      closable: true,
+      title: t('page.signTx.customRPCErrorModal.title'),
+      content: t('page.signTx.customRPCErrorModal.content'),
+      okText: t('page.signTx.customRPCErrorModal.button'),
+      okButtonProps: {
+        className: 'w-[280px]',
+      },
+      async onOk() {
+        await wallet.setRPCEnable(chain.enum, false);
+        location.reload();
+      },
+    });
+  };
+
   const {
     data = '0x',
     from,
@@ -916,12 +931,18 @@ const SignTx = ({ params, origin }: SignTxProps) => {
   const explainTx = async (address: string) => {
     let recommendNonce = '0x0';
     if (!isGnosisAccount && !isCoboArugsAccount) {
-      recommendNonce = await getRecommendNonce({
-        tx,
-        wallet,
-        chainId,
-      });
-      setRecommendNonce(recommendNonce);
+      try {
+        recommendNonce = await getRecommendNonce({
+          tx,
+          wallet,
+          chainId,
+        });
+        setRecommendNonce(recommendNonce);
+      } catch (e) {
+        if (await wallet.hasCustomRPC(chain.enum)) {
+          triggerCustomRPCErrorModal();
+        }
+      }
     }
     if (updateNonce && !isGnosisAccount && !isCoboArugsAccount) {
       setRealNonce(recommendNonce);
@@ -986,7 +1007,9 @@ const SignTx = ({ params, origin }: SignTxProps) => {
           );
           setBlockInfo(block);
         } catch (e) {
-          // DO NOTHING
+          if (await wallet.hasCustomRPC(chain.enum)) {
+            triggerCustomRPCErrorModal();
+          }
         }
         if (tx.gas && origin === INTERNAL_REQUEST_ORIGIN) {
           setGasLimit(intToHex(Number(tx.gas))); // use origin gas as gasLimit when tx is an internal tx with gasLimit(i.e. for SendMax native token)
@@ -1635,13 +1658,19 @@ const SignTx = ({ params, origin }: SignTxProps) => {
           (item) => item.type === currentAccount.type
         )
       );
-      const balance = await getNativeTokenBalance({
-        wallet,
-        chainId,
-        address: currentAccount.address,
-      });
+      try {
+        const balance = await getNativeTokenBalance({
+          wallet,
+          chainId,
+          address: currentAccount.address,
+        });
 
-      setNativeTokenBalance(balance);
+        setNativeTokenBalance(balance);
+      } catch (e) {
+        if (await wallet.hasCustomRPC(chain.enum)) {
+          triggerCustomRPCErrorModal();
+        }
+      }
 
       wallet.reportStats('createTransaction', {
         type: currentAccount.brandName,