Bug: forms don't behave correctly with Lit custom elements

[astagi]

React version: 19.0.0

Steps To Reproduce

1. Use Lit custom element inside a form (an input and a submit button)
2. Try to get the input value

Link to code example:

• Custom element implementation: https://github.com/test-wc/test-wc/tree/feature/forms
• React usage: https://github.com/test-wc/react-wc/blob/features/forms/src/App.js

The current behavior

Custom elements behave correctly in Angular, VanillaJS, Vue and React using react-hook-forms

The expected behavior

I'd like to see it working using the native form in React