[Select] Using keyboard Tab while Select is open does not move focus to the next field

[rh-meowsa]

Steps to reproduce

Link to live example: https://mui.com/base-ui/react-select/

Steps:

1. Create a Select and also another field like an Input and or Button after the Select component
2. Pop open the Select dropdown
3. Hit keyboard Tab

Current behavior

Focus goes to the browser's address bar

Expected behavior

Focus goes to the next focusable item after the Select

Context

a11y support for forms

Your environment

npx @mui/envinfo

System:
OS: macOS 14.4.1
Binaries:
Node: 18.18.2 - ~/.nvm/versions/node/v18.18.2/bin/node
npm: 9.8.1 - ~/.nvm/versions/node/v18.18.2/bin/npm
pnpm: 8.6.11 - /opt/homebrew/bin/pnpm
Browsers:
Chrome: 123.0.6312.124
Edge: Not Found
Safari: 17.4.1
npmPackages:
@mui/base: 5.0.0-beta.37 => 5.0.0-beta.37
@types/react: 18.2.42 => 18.2.42
react: 18.2.0 => 18.2.0
react-dom: 18.2.0 => 18.2.0

Using Chrome 123.0.6312.124

Search keywords: Keyboard, tab, Select

Search keywords:

[michaldudak]

Thanks for reporting this. It's not a desired behavior.
We are currently redesigning Base UI components (with a different customization API), and we should tackle the Select around June (see https://github.com/orgs/mui/projects/1/views/13). We'll work on fixing this then.