Jun 8, 2019
With the massive volume of appealing content on Instagram, it is more than tempting for people to take screenshot or records of what is displayed for them. At the beginning of 2018, Instagram ran a test for some three months to send notifications on screenshots of stories. Due to the negative feedback from users, Instagram Screenshot Notification feature which started in February 2018, was rolled back by June, the same year.
https://instagooo.com/blog/tutorial/everything-you-should-know-about-instagram-screenshot-notification/