[Autocomplete] component crash when groupBy function is set after opening popup
Author: KariHeCreated Sep 16, 2026Updated Sep 17, 2026
Labelstype: bugscope: autocompletehas workaround
Steps to reproduce
Steps:
- Open this link to live example: https://stackblitz.com/edit/github-jun8thjs?file=src%2FApp.tsx
- Open autocomplete input, so that popup is open
- Click checkbox to enable grouping
Current behavior
Application crashes with error Cannot read properties of undefined (reading 'map')
Expected behavior
Menu items in popup should be grouped or popup is closed without crash. This is not causing crash on version 6.x.
Context
We want dynamically set autocomplete input option grouping. In our application grouping is enabled depending on other context that selections from this input can influence. We group autocomplete search values based on that if they are part of current selected context or not.
Your environment
npx @mui/envinfo System:
OS: macOS 26.6.2
Binaries:
Node: 26.5.0 - /Users/xxx/.nvm/versions/node/v26.5.0/bin/node
npm: 11.17.0 - /Users/xxx/.nvm/versions/node/v26.5.0/bin/npm
pnpm: Not Found
Browsers:
Chrome: 152.0.7977.84
Edge: Not Found
Firefox: Not Found
Safari: 26.6.2
npmPackages:
@base-ui/utils: 0.3.2
@emotion/react: 11.14.0
@emotion/styled: 11.14.1
@mui/core-downloads-tracker: 9.4.0
@mui/icons-material: 9.4.0
@mui/lab: 9.0.0-beta.9
@mui/material: 9.4.0
@mui/private-theming: 9.4.0
@mui/styled-engine: 9.4.0
@mui/system: 9.4.0
@mui/types: 9.4.0
@mui/utils: 9.4.0
@mui/x-data-grid: 9.13.0
@mui/x-data-grid-premium: 9.13.0
@mui/x-data-grid-pro: 9.13.0
@mui/x-date-pickers: 9.13.0
@mui/x-date-pickers-pro: 9.13.0
@mui/x-internal-exceljs-fork: 5.0.0
@mui/x-internals: 9.13.0
@mui/x-license: 9.13.0
@mui/x-telemetry: 9.13.0
@mui/x-tree-view: 9.13.0
@mui/x-virtualizer: 0.7.1
@types/react: 18.3.29
react: 18.3.1
react-dom: 18.2.0
typescript: ^5.8.3 => 5.9.3 Search keywords: autocomplete grouping
Source: mui/material-ui