diff --git a/web/.gitignore b/web/.gitignore
index 1a81282c4c..9de3dc83f9 100644
--- a/web/.gitignore
+++ b/web/.gitignore
@@ -64,6 +64,3 @@ public/fallback-*.js
 
 .vscode/settings.json
 .vscode/mcp.json
-
-# CodeGraph local index
-.codegraph/
diff --git a/web/app/components/header/account-setting/members-page/__tests__/index.spec.tsx b/web/app/components/header/account-setting/members-page/__tests__/index.spec.tsx
index 6266da59b8..92d5df556a 100644
--- a/web/app/components/header/account-setting/members-page/__tests__/index.spec.tsx
+++ b/web/app/components/header/account-setting/members-page/__tests__/index.spec.tsx
@@ -9,12 +9,14 @@ import { Plan } from '@/app/components/billing/type'
 import { useAppContext } from '@/context/app-context'
 import { useProviderContext } from '@/context/provider-context'
 import { useFormatTimeFromNow } from '@/hooks/use-format-time-from-now'
+import { useUpdateRolesOfMember } from '@/service/access-control/use-member-roles'
 import { useMembers } from '@/service/use-common'
 import MembersPage from '../index'
 
 vi.mock('@/context/app-context')
 vi.mock('@/context/provider-context')
 vi.mock('@/hooks/use-format-time-from-now')
+vi.mock('@/service/access-control/use-member-roles')
 vi.mock('@/service/use-common')
 
 const renderMembersPage = () => renderWithSystemFeatures(<MembersPage />, {
@@ -94,11 +96,22 @@ vi.mock('../transfer-ownership-modal', () => ({
   ),
 }))
 vi.mock('../member-details-modal', () => ({
-  default: ({ member, onClose, canAssignRoles }: { member: Member, onClose: () => void, canAssignRoles?: boolean }) => (
+  default: ({
+    member,
+    onClose,
+    canAssignRoles,
+    onAssignSubmit,
+  }: {
+    member: Member
+    onClose: () => void
+    canAssignRoles?: boolean
+    onAssignSubmit?: (roleIds: string[]) => void
+  }) => (
     <div>
       <div>Member Details Modal</div>
       <div data-testid="details-member-name">{member.name}</div>
       <div data-testid="details-can-assign">{String(canAssignRoles)}</div>
+      <button onClick={() => onAssignSubmit?.(['role-next'])}>Submit Member Roles</button>
       <button onClick={onClose}>Close Member Details Modal</button>
     </div>
   ),
@@ -110,6 +123,7 @@ vi.mock('@/app/components/billing/upgrade-btn', () => ({
 describe('MembersPage', () => {
   const mockRefetch = vi.fn()
   const mockFormatTimeFromNow = vi.fn(() => 'just now')
+  const mockUpdateRolesOfMember = vi.fn()
 
   const mockAccounts: Member[] = [
     {
@@ -155,6 +169,13 @@ describe('MembersPage', () => {
       data: { accounts: mockAccounts },
       refetch: mockRefetch,
     } as unknown as ReturnType<typeof useMembers>)
+    mockUpdateRolesOfMember.mockImplementation((_payload, options) => {
+      options?.onSuccess?.()
+      return Promise.resolve()
+    })
+    vi.mocked(useUpdateRolesOfMember).mockReturnValue({
+      mutateAsync: mockUpdateRolesOfMember,
+    } as unknown as ReturnType<typeof useUpdateRolesOfMember>)
 
     vi.mocked(useProviderContext).mockReturnValue(createMockProviderContextValue({
       enableBilling: false,
@@ -486,6 +507,23 @@ describe('MembersPage', () => {
     expect(screen.getByTestId('details-can-assign'))!.toHaveTextContent('false')
   })
 
+  it('should keep member details open after role assignment succeeds', async () => {
+    const user = userEvent.setup()
+
+    renderMembersPage()
+
+    await user.click(screen.getByTestId('member-row-2'))
+    await user.click(screen.getByRole('button', { name: 'Submit Member Roles' }))
+
+    expect(mockUpdateRolesOfMember).toHaveBeenCalledWith({
+      memberId: '2',
+      roleIds: ['role-next'],
+    }, expect.any(Object))
+    expect(mockRefetch).toHaveBeenCalled()
+    expect(screen.getByText('Member Details Modal')).toBeInTheDocument()
+    expect(screen.getByTestId('details-member-name')).toHaveTextContent('Admin User')
+  })
+
   it('should not open member details when clicking the member menu area', async () => {
     const user = userEvent.setup()
 
diff --git a/web/app/components/header/account-setting/members-page/assign-roles-modal/index.tsx b/web/app/components/header/account-setting/members-page/assign-roles-modal/index.tsx
index 376a38a781..34f643d619 100644
--- a/web/app/components/header/account-setting/members-page/assign-roles-modal/index.tsx
+++ b/web/app/components/header/account-setting/members-page/assign-roles-modal/index.tsx
@@ -1,6 +1,5 @@
 'use client'
 
-import type { Member } from '@/models/common'
 import { Button } from '@langgenius/dify-ui/button'
 import {
   Dialog,
@@ -14,7 +13,7 @@ import { useTranslation } from 'react-i18next'
 import WorkspaceRoleCheckboxList from '../../workspace-role-checkbox-list'
 
 export type AssignRolesModalProps = {
-  member: Member
+  selectedRoles: string[]
   onClose: () => void
   onSubmit: (roleIds: string[]) => void
 }
@@ -22,14 +21,12 @@ export type AssignRolesModalProps = {
 type AssignRolesModalBodyProps = AssignRolesModalProps
 
 const AssignRolesModalBody = ({
-  member,
+  selectedRoles,
   onClose,
   onSubmit,
 }: AssignRolesModalBodyProps) => {
   const { t } = useTranslation()
-  const [selected, setSelected] = useState<string[]>(() => {
-    return member.roles?.map(role => role.id) || []
-  })
+  const [selected, setSelected] = useState(selectedRoles)
 
   const handleConfirm = () => {
     onSubmit(selected)
@@ -83,7 +80,7 @@ const AssignRolesModalBody = ({
 }
 
 const AssignRolesModal = ({
-  member,
+  selectedRoles,
   onClose,
   onSubmit,
 }: AssignRolesModalProps) => {
@@ -96,7 +93,7 @@ const AssignRolesModal = ({
       }}
     >
       <AssignRolesModalBody
-        member={member}
+        selectedRoles={selectedRoles}
         onClose={onClose}
         onSubmit={onSubmit}
       />
diff --git a/web/app/components/header/account-setting/members-page/index.tsx b/web/app/components/header/account-setting/members-page/index.tsx
index c217c5e0e5..a9b2befa96 100644
--- a/web/app/components/header/account-setting/members-page/index.tsx
+++ b/web/app/components/header/account-setting/members-page/index.tsx
@@ -62,7 +62,6 @@ const MembersPage = () => {
       onSuccess: () => {
         toast.success(t('actionMsg.modifiedSuccessfully', { ns: 'common' }))
         refetch()
-        handleCloseDetails()
       },
     })
   }
diff --git a/web/app/components/header/account-setting/members-page/member-details-modal/index.tsx b/web/app/components/header/account-setting/members-page/member-details-modal/index.tsx
index f70e1cc23f..41a2cd695e 100644
--- a/web/app/components/header/account-setting/members-page/member-details-modal/index.tsx
+++ b/web/app/components/header/account-setting/members-page/member-details-modal/index.tsx
@@ -35,8 +35,9 @@ const MemberDetailsModal = ({
 
   const roles = useMemo(() => rolesOfMember?.roles ?? [], [rolesOfMember?.roles])
 
-  const builtinRoles = roles.filter(role => role.is_builtin)
-  const customRoles = roles.filter(role => !role.is_builtin)
+  const builtinRoles = useMemo(() => roles.filter(role => role.is_builtin), [roles])
+  const customRoles = useMemo(() => roles.filter(role => !role.is_builtin), [roles])
+  const selectedRoles = useMemo(() => roles.map(role => role.id), [roles])
 
   const handleClose = useCallback(() => {
     setAssignOpen(false)
@@ -48,9 +49,9 @@ const MemberDetailsModal = ({
   }, [onAssignSubmit])
 
   const handleRemove = useCallback((id: string) => {
-    const roleIds = roles.map(role => role.id).filter(roleId => roleId !== id)
+    const roleIds = selectedRoles.filter(roleId => roleId !== id)
     onAssignSubmit?.(roleIds)
-  }, [roles, onAssignSubmit])
+  }, [selectedRoles, onAssignSubmit])
 
   return (
     <>
@@ -167,7 +168,7 @@ const MemberDetailsModal = ({
 
       {assignOpen && (
         <AssignRolesModal
-          member={member}
+          selectedRoles={selectedRoles}
           onClose={handleClose}
           onSubmit={handleAssignSubmit}
         />
diff --git a/web/app/components/header/account-setting/members-page/member-menu.tsx b/web/app/components/header/account-setting/members-page/member-menu.tsx
index 21c0585ece..5ea55adbb2 100644
--- a/web/app/components/header/account-setting/members-page/member-menu.tsx
+++ b/web/app/components/header/account-setting/members-page/member-menu.tsx
@@ -9,7 +9,7 @@ import {
   DropdownMenuTrigger,
 } from '@langgenius/dify-ui/dropdown-menu'
 import { toast } from '@langgenius/dify-ui/toast'
-import { memo, useState } from 'react'
+import { memo, useCallback, useMemo, useState } from 'react'
 import { useTranslation } from 'react-i18next'
 import ActionButton from '@/app/components/base/action-button'
 import { useUpdateRolesOfMember } from '@/service/access-control/use-member-roles'
@@ -40,14 +40,16 @@ const MemberMenu = ({
   const canRemove = !isOwner && !isCurrentUser
   const showTransferOwnership = isOwner && canTransferOwnership
 
-  const handleOpenAssignRoles = () => {
+  const selectedRoles = useMemo(() => member.roles?.map(role => role.id) || [], [member.roles])
+
+  const handleOpenAssignRoles = useCallback(() => {
     setOpen(false)
     setAssignModalOpen(true)
-  }
+  }, [])
 
   const { mutateAsync: updateRolesOfMember } = useUpdateRolesOfMember()
 
-  const handleAssignRolesSubmit = (roleIds: string[]) => {
+  const handleAssignRolesSubmit = useCallback((roleIds: string[]) => {
     updateRolesOfMember({
       memberId: member.id,
       roleIds,
@@ -57,9 +59,9 @@ const MemberMenu = ({
         onOperate()
       },
     })
-  }
+  }, [member.id, onOperate, t, updateRolesOfMember])
 
-  const handleRemove = async () => {
+  const handleRemove = useCallback(async () => {
     setOpen(false)
     try {
       await deleteMemberOrCancelInvitation({ url: `/workspaces/current/members/${member.id}` })
@@ -68,18 +70,27 @@ const MemberMenu = ({
     }
     catch {
     }
-  }
+  }, [member.id, onOperate, t])
 
-  const handleTransferOwnership = () => {
+  const handleTransferOwnership = useCallback(() => {
     setOpen(false)
     onTransferOwnership?.()
-  }
+  }, [onTransferOwnership])
+
+  const stopPropagationOnClick = useCallback((e: React.MouseEvent) => {
+    e.stopPropagation()
+  }, [])
+
+  const stopPropagationOnKeyDown = useCallback((e: React.KeyboardEvent<HTMLDivElement>) => {
+    if (e.key === 'Enter' || e.key === ' ')
+      e.stopPropagation()
+  }, [])
 
   if (!canAssignRoles && !canRemove && !showTransferOwnership)
     return null
 
   return (
-    <>
+    <div onClick={stopPropagationOnClick} onKeyDown={stopPropagationOnKeyDown}>
       <DropdownMenu open={open} onOpenChange={setOpen}>
         <DropdownMenuTrigger
           render={(
@@ -129,12 +140,12 @@ const MemberMenu = ({
       </DropdownMenu>
       {assignModalOpen && (
         <AssignRolesModal
-          member={member}
+          selectedRoles={selectedRoles}
           onClose={() => setAssignModalOpen(false)}
           onSubmit={handleAssignRolesSubmit}
         />
       )}
-    </>
+    </div>
   )
 }