This is according to a report from BuzzFeed News in which Instagram has confirmed with them that they have concluded the testing of the feature. The company did not provide any kind of statement but either way it is good news for those who want to screenshot Instagram Stories to share with their friends, or maybe keep for themselves, or whatever reason you might have to screenshot a Story in the first place.
While it was an interesting feature, it was quickly discovered that there were workarounds, namely users could put their phones into Airplane mode and disable WiFi and cellular connectivity, take the screenshot, and no one would be the wiser. That being said, Instagram is expected to still keep the feature where they notify users when their disappearing direct messages have been screenshotted, so that feature won’t be going away just yet.