Originally Answered: Why has the conversation I had on Instagram with someone disappeared? If only other person conversation deleted means the person deleted messages. If whole conversation deleted and you unable to find the person in chat list means that person BLOCKED you.
Do DM messages disappear on Instagram?
It is unsent by the sender Instagram has lately added a new feature to remove a message that the person has already sent. In this case, if the sender unsent it before you open the conversation, you won't be able to see the message, and it disappears.17 may 2019