Controlled Select component is resetting itself only on React 19

[BoneFiend]

Bug report

Current Behavior

1. The Select is initially mounted in a component with a default value ('1').
2. After a short delay (simulated with useEffect), the component updates the value to '2'.
3. Select receives this updated value but spontaneously calls onValueChange with an empty string, which resets the value to ''.

Expected behavior

Select should accept the controlled value without spontaneously resetting it to blank. Console observed in React 18:

Reproducible example

export function SelectTest() {
  const [value, setValue] = useState('1')

  console.log('value:', value)

  const options = [
    { value: '1', label: 'Option 1' },
    { value: '2', label: 'Option 2' },
  ]

  useEffect(() => {
    console.log('resetting to 2')
    setValue('2')
  }, [])

  const onChange = (value: string) => {
    console.log('onChange:', value)
    setValue(value)
  }

  return (
    <Select.Root value={value} onValueChange={onChange}>
      <Select.Trigger className="flex w-20 justify-between border border-ui-accent bg-ui-blank">
        <Select.Value />
        <Select.Icon />
      </Select.Trigger>
      <Select.Portal>
        <Select.Content className="border border-ui-accent bg-ui-blank">
          <Select.Viewport>
            {options.map((option) => (
              <Select.Item key={option.value} value={option.value}>
                <Select.ItemText>{option.value}</Select.ItemText>
                <Select.ItemIndicator />
              </Select.Item>
            ))}
          </Select.Viewport>
        </Select.Content>
      </Select.Portal>
    </Select.Root>
  )
}

Additional context

This issue only occurs when using React 19. The above code has been tested on React 18 with no issue

Your environment

Software	Name(s)	Version
Radix Package(s)	@radix-ui/react-select	2.1.6
React	n/a	19.0.0
Browser	Firefox	135.0
Assistive tech
Node	n/a	v20.12.2
npm/yarn	pnpm	9.0.6
Operating System	Windows	11

[BoneFiend]

This issue is actually the fault of React 19 improperly handling select inputs inside form tags. See React issue 30580