diff --git a/packages/core/src/lib/session.ts b/packages/core/src/lib/session.ts
index e55d13001..86ff51ba4 100644
--- a/packages/core/src/lib/session.ts
+++ b/packages/core/src/lib/session.ts
@@ -1,3 +1,5 @@
+import { conditional } from '@silverhand/essentials';
+import { getUnixTime } from 'date-fns';
 import type { Context } from 'koa';
 import type { InteractionResults, Provider } from 'oidc-provider';
 
@@ -14,20 +16,32 @@ export const assignInteractionResults = async (
   // have to do it manually
   // refer to: https://github.com/panva/node-oidc-provider/blob/c243bf6b6663c41ff3e75c09b95fb978eba87381/lib/actions/authorization/interactions.js#L106
   const details = merge ? await provider.interactionDetails(ctx.req, ctx.res) : undefined;
-
+  const ts = getUnixTime(new Date());
+  const mergedResult = {
+    // Merge with current result
+    ...details?.result,
+    ...result,
+  };
   const redirectTo = await provider.interactionResult(
     ctx.req,
     ctx.res,
     {
-      // Merge with current result
-      ...details?.result,
-      ...result,
+      ...mergedResult,
+      ...conditional(
+        mergedResult.login && {
+          login: {
+            ...mergedResult.login,
+            // Update ts(timestamp) if the accountId has been set in result
+            ts: result.login?.accountId ? ts : mergedResult.login.ts,
+          },
+        }
+      ),
     },
     {
       mergeWithLastSubmission: merge,
     }
   );
-  ctx.body = { redirectTo };
+  ctx.body = { redirectTo, ts };
 };
 
 export const saveUserFirstConsentedAppId = async (userId: string, applicationId: string) => {
diff --git a/packages/core/src/routes/session/continue.test.ts b/packages/core/src/routes/session/continue.test.ts
index 76d4456fe..05ae2f17b 100644
--- a/packages/core/src/routes/session/continue.test.ts
+++ b/packages/core/src/routes/session/continue.test.ts
@@ -89,7 +89,8 @@ describe('session -> continueRoutes', () => {
       expect(interactionResult).toHaveBeenCalledWith(
         expect.anything(),
         expect.anything(),
-        expect.objectContaining({ login: { accountId: mockUser.id } }),
+        // eslint-disable-next-line @typescript-eslint/no-unsafe-assignment
+        expect.objectContaining({ login: { accountId: mockUser.id, ts: expect.any(Number) } }),
         expect.anything()
       );
     });
@@ -121,7 +122,8 @@ describe('session -> continueRoutes', () => {
       expect(interactionResult).toHaveBeenCalledWith(
         expect.anything(),
         expect.anything(),
-        expect.objectContaining({ login: { accountId: mockUser.id } }),
+        // eslint-disable-next-line @typescript-eslint/no-unsafe-assignment
+        expect.objectContaining({ login: { accountId: mockUser.id, ts: expect.any(Number) } }),
         expect.anything()
       );
     });
@@ -156,7 +158,8 @@ describe('session -> continueRoutes', () => {
       expect(interactionResult).toHaveBeenCalledWith(
         expect.anything(),
         expect.anything(),
-        expect.objectContaining({ login: { accountId: mockUser.id } }),
+        // eslint-disable-next-line @typescript-eslint/no-unsafe-assignment
+        expect.objectContaining({ login: { accountId: mockUser.id, ts: expect.any(Number) } }),
         expect.anything()
       );
     });
@@ -188,7 +191,8 @@ describe('session -> continueRoutes', () => {
       expect(interactionResult).toHaveBeenCalledWith(
         expect.anything(),
         expect.anything(),
-        expect.objectContaining({ login: { accountId: mockUser.id } }),
+        // eslint-disable-next-line @typescript-eslint/no-unsafe-assignment
+        expect.objectContaining({ login: { accountId: mockUser.id, ts: expect.any(Number) } }),
         expect.anything()
       );
     });
diff --git a/packages/core/src/routes/session/password.test.ts b/packages/core/src/routes/session/password.test.ts
index a3c0af8c8..212cd7645 100644
--- a/packages/core/src/routes/session/password.test.ts
+++ b/packages/core/src/routes/session/password.test.ts
@@ -111,7 +111,8 @@ describe('session -> password routes', () => {
     expect(interactionResult).toHaveBeenCalledWith(
       expect.anything(),
       expect.anything(),
-      expect.objectContaining({ login: { accountId: 'id' } }),
+      // eslint-disable-next-line @typescript-eslint/no-unsafe-assignment
+      expect.objectContaining({ login: { accountId: 'id', ts: expect.any(Number) } }),
       expect.anything()
     );
   });
@@ -127,7 +128,8 @@ describe('session -> password routes', () => {
     expect(interactionResult).toHaveBeenCalledWith(
       expect.anything(),
       expect.anything(),
-      expect.objectContaining({ login: { accountId: 'id' } }),
+      // eslint-disable-next-line @typescript-eslint/no-unsafe-assignment
+      expect.objectContaining({ login: { accountId: 'id', ts: expect.any(Number) } }),
       expect.anything()
     );
   });
@@ -143,7 +145,8 @@ describe('session -> password routes', () => {
     expect(interactionResult).toHaveBeenCalledWith(
       expect.anything(),
       expect.anything(),
-      expect.objectContaining({ login: { accountId: 'id' } }),
+      // eslint-disable-next-line @typescript-eslint/no-unsafe-assignment
+      expect.objectContaining({ login: { accountId: 'id', ts: expect.any(Number) } }),
       expect.anything()
     );
   });
@@ -172,7 +175,8 @@ describe('session -> password routes', () => {
       expect(interactionResult).toHaveBeenCalledWith(
         expect.anything(),
         expect.anything(),
-        expect.objectContaining({ login: { accountId: 'user1' } }),
+        // eslint-disable-next-line @typescript-eslint/no-unsafe-assignment
+        expect.objectContaining({ login: { accountId: 'user1', ts: expect.any(Number) } }),
         expect.anything()
       );
       jest.useRealTimers();
diff --git a/packages/core/src/routes/session/passwordless.test.ts b/packages/core/src/routes/session/passwordless.test.ts
index 47dc04c74..77d428e20 100644
--- a/packages/core/src/routes/session/passwordless.test.ts
+++ b/packages/core/src/routes/session/passwordless.test.ts
@@ -392,7 +392,8 @@ describe('session -> passwordlessRoutes', () => {
         expect.anything(),
         expect.anything(),
         expect.objectContaining({
-          login: { accountId: mockUser.id },
+          // eslint-disable-next-line @typescript-eslint/no-unsafe-assignment
+          login: { accountId: mockUser.id, ts: expect.any(Number) },
         }),
         expect.anything()
       );
@@ -414,7 +415,8 @@ describe('session -> passwordlessRoutes', () => {
         expect.anything(),
         expect.anything(),
         expect.objectContaining({
-          login: { accountId: mockUser.id },
+          // eslint-disable-next-line @typescript-eslint/no-unsafe-assignment
+          login: { accountId: mockUser.id, ts: expect.any(Number) },
         }),
         expect.anything()
       );
@@ -555,7 +557,8 @@ describe('session -> passwordlessRoutes', () => {
         expect.anything(),
         expect.anything(),
         expect.objectContaining({
-          login: { accountId: mockUser.id },
+          // eslint-disable-next-line @typescript-eslint/no-unsafe-assignment
+          login: { accountId: mockUser.id, ts: expect.any(Number) },
         }),
         expect.anything()
       );
@@ -579,7 +582,8 @@ describe('session -> passwordlessRoutes', () => {
         expect.anything(),
         expect.anything(),
         expect.objectContaining({
-          login: { accountId: mockUser.id },
+          // eslint-disable-next-line @typescript-eslint/no-unsafe-assignment
+          login: { accountId: mockUser.id, ts: expect.any(Number) },
         }),
         expect.anything()
       );
@@ -688,7 +692,8 @@ describe('session -> passwordlessRoutes', () => {
         expect.anything(),
         expect.anything(),
         expect.objectContaining({
-          login: { accountId: 'user1' },
+          // eslint-disable-next-line @typescript-eslint/no-unsafe-assignment
+          login: { accountId: 'user1', ts: expect.any(Number) },
         }),
         expect.anything()
       );
@@ -710,7 +715,8 @@ describe('session -> passwordlessRoutes', () => {
         expect.anything(),
         expect.anything(),
         expect.objectContaining({
-          login: { accountId: 'user1' },
+          // eslint-disable-next-line @typescript-eslint/no-unsafe-assignment
+          login: { accountId: 'user1', ts: expect.any(Number) },
         }),
         expect.anything()
       );
@@ -816,7 +822,8 @@ describe('session -> passwordlessRoutes', () => {
         expect.anything(),
         expect.anything(),
         expect.objectContaining({
-          login: { accountId: 'user1' },
+          // eslint-disable-next-line @typescript-eslint/no-unsafe-assignment
+          login: { accountId: 'user1', ts: expect.any(Number) },
         }),
         expect.anything()
       );
@@ -838,7 +845,8 @@ describe('session -> passwordlessRoutes', () => {
         expect.anything(),
         expect.anything(),
         expect.objectContaining({
-          login: { accountId: 'user1' },
+          // eslint-disable-next-line @typescript-eslint/no-unsafe-assignment
+          login: { accountId: 'user1', ts: expect.any(Number) },
         }),
         expect.anything()
       );
diff --git a/packages/core/src/routes/session/social.test.ts b/packages/core/src/routes/session/social.test.ts
index e00a6a8cd..d67f2b3f9 100644
--- a/packages/core/src/routes/session/social.test.ts
+++ b/packages/core/src/routes/session/social.test.ts
@@ -1,3 +1,4 @@
+/* eslint-disable max-lines */
 import { ConnectorType } from '@logto/connector-kit';
 import type { User } from '@logto/schemas';
 import { SignUpIdentifier } from '@logto/schemas';
@@ -233,7 +234,8 @@ describe('session -> socialRoutes', () => {
       expect(interactionResult).toHaveBeenCalledWith(
         expect.anything(),
         expect.anything(),
-        expect.objectContaining({ login: { accountId: mockUser.id } }),
+        // eslint-disable-next-line @typescript-eslint/no-unsafe-assignment
+        expect.objectContaining({ login: { accountId: mockUser.id, ts: expect.any(Number) } }),
         expect.anything()
       );
     });
@@ -316,7 +318,8 @@ describe('session -> socialRoutes', () => {
       expect(interactionResult).toHaveBeenCalledWith(
         expect.anything(),
         expect.anything(),
-        expect.objectContaining({ login: { accountId: 'user1' } }),
+        // eslint-disable-next-line @typescript-eslint/no-unsafe-assignment
+        expect.objectContaining({ login: { accountId: 'user1', ts: expect.any(Number) } }),
         expect.anything()
       );
     });
@@ -350,7 +353,8 @@ describe('session -> socialRoutes', () => {
       expect(interactionResult).toHaveBeenCalledWith(
         expect.anything(),
         expect.anything(),
-        expect.objectContaining({ login: { accountId: 'user1' } }),
+        // eslint-disable-next-line @typescript-eslint/no-unsafe-assignment
+        expect.objectContaining({ login: { accountId: 'user1', ts: expect.any(Number) } }),
         expect.anything()
       );
     });
@@ -364,7 +368,10 @@ describe('session -> socialRoutes', () => {
     });
 
     it('throw error if result parsing fails', async () => {
-      interactionDetails.mockResolvedValueOnce({ result: { login: { accountId: mockUser.id } } });
+      interactionDetails.mockResolvedValueOnce({
+        // eslint-disable-next-line @typescript-eslint/no-unsafe-assignment
+        result: { login: { accountId: mockUser.id, ts: expect.any(Number) } },
+      });
       const response = await sessionRequest
         .post(`${registerRoute}`)
         .send({ connectorId: 'connectorId' });
@@ -436,3 +443,4 @@ describe('session -> socialRoutes', () => {
     });
   });
 });
+/* eslint-enable max-lines */
diff --git a/packages/core/src/routes/session/utils.test.ts b/packages/core/src/routes/session/utils.test.ts
index 3bceb3391..49d6e2255 100644
--- a/packages/core/src/routes/session/utils.test.ts
+++ b/packages/core/src/routes/session/utils.test.ts
@@ -121,7 +121,8 @@ describe('signInWithPassword()', () => {
     expect(interactionResult).toHaveBeenCalledWith(
       expect.anything(),
       expect.anything(),
-      expect.objectContaining({ login: { accountId: mockUser.id } }),
+      // eslint-disable-next-line @typescript-eslint/no-unsafe-assignment
+      expect.objectContaining({ login: { accountId: mockUser.id, ts: expect.any(Number) } }),
       expect.anything()
     );
   });