Different message types are no longer going to be separated in Instagram Direct, the social network service's direct messaging section. With an update to the app, Instagram has combined permanent and ephemeral messages.
If a message is set to only last for a certain amount of time, it'll show up in a regular chat thread and eventually disappear. Instagram had been placing permanent chats at the top of the screen and ephemeral ones below.
In cases where a conversation includes both types of messages, this update should make it simpler to carry out the conversation.