Intl.DateTimeFormat.formatRange polyfill doesn't match web reality

[longlho]

const date1 = new Date(Date.UTC(2021, 4, 19, 9, 0)) // "May 19, 2021, 9 AM"
const date2 = new Date(Date.UTC(2021, 5, 19, 17, 0)) // "Jun 19, 2021, 5 PM"
const dtf = new DateTimeFormat('en', {
  hour: 'numeric',
  minute: 'numeric',
  timeZone: 'America/New_York',
})
dtf.formatRange(date1, date2) // Should return 5/19/2021, 5:00 AM – 6/19/2021, 1:00 PM but right now returning 5:00 AM - 1:00 PM

[github-actions]

This issue has been automatically marked as stale because it has not had recent activity. It will be closed if no further activity occurs. Thank you for your contributions.

[CoatedMoose]

I have the same issue as #2962, but it is marked as a duplicate of this issue.

The example on this issue describes a range spread across days only showing the time part(s), while the issue I have is that a range (1h, same day) should only show the date part(s) once. Are these actually the same issue?