Multiselect onChange not changing values

[Fronix]

Prerequisites

• I have searched the existing issues
• I understand that providing a SSCCE example is tremendously useful to the maintainers.
• I have read the documentation
• Ideally, I'm providing a sample JSFiddle, Codesandbox.io or preferably a shared playground link demonstrating the issue.

What theme are you using?

mui

Version

6.0.0-beta.14

Current Behavior

Currently multiselect fields does not change form value, the onChange fires but value is not changed. I've tried with both default theme and mui theme, same issue.

Single select values do work.

See video:
https://github.com/user-attachments/assets/2bd0dee6-2887-4318-95d2-6be43f8f4bad

or gif

Expected Behavior

That the array values change.

Steps To Reproduce

1. Create a multiselect field
2. Try to change the values

Share link

Environment

- OS: Windows 11
- Node: 22.15.1
- npm: 10.9.2

Anything else?

No response