Instagram has just released an update to their Statistics for IG Stories, removing the list of people who viewed the Story as soon as it expires.
While as the Story is live, the author can see who is viewing the Story but as soon as it expires (24 hours), the list of viewers disappears and the following message appears instead.
We couldn’t find any announcement regarding the change and it appears the new limitations went live for both the iOS and Android app at the same time.