- [x] The issue is present in the latest release. - [x] I have searched the [issues](https://github.com/mui-org/material-ui/issues) of this repository and believe that this is not a duplicate. ## Current Behavior 😯 The combo box follows [ARIA 1.1](https://www.w3.org/TR/wai-aria-practices/examples/combobox/aria1.1pattern/listbox-combo.html). ## Expected Behavior 🤔 The combo box follows ARIA 1.2 <img width="841" alt="Screenshot 2021-03-14 at 18 53 29" src="https://user-images.githubusercontent.com/3165635/111078610-a03b6380-84f6-11eb-80fc-7ecdeb7d19d9.png"> https://www.w3.org/TR/wai-aria-1.2/#combobox The new implementation example: https://www.w3.org/WAI/ARIA/apg/patterns/combobox/. ## Related efforts - https://github.com/carbon-design-system/carbon/pull/7777 ## Your Environment 🌎 v5.0.0-alpha.27
Current Behavior 😯
The combo box follows ARIA 1.1.
Expected Behavior 🤔
The combo box follows ARIA 1.2
https://www.w3.org/TR/wai-aria-1.2/#combobox
The new implementation example: https://www.w3.org/WAI/ARIA/apg/patterns/combobox/.
Related efforts
Your Environment 🌎
v5.0.0-alpha.27