Code highlight is sometimes broken inside expression blocks

[liady]

Describe the bug When there are multiple JSX elements inside an expression block the code highlight doesn't always match the selection and the canvas

To Reproduce Use this code for storyboard.js:

import * as React from 'react'
import { Storyboard } from 'utopia-api'

export var storyboard = (
  <Storyboard>
    {
      <>
        <View />
        <View />
        <View />
      </>
    }
  </Storyboard>
)

function View({ title = 'x', bool }) {
  return <div>{title}</div>
}

Select differentView elements from the navigator, the code highlight doesn't always match

Expected behaviour The code highlight should match the selection

Screenshots