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Typically, cupcake notifications are reserved for birthdays, and only appear once a year. Now, though, many are wondering whether the symbol has a hidden meaning that is unconnected from birthday celebrations.
Instagram has not issued any statements about the cupcake notification, but there’s been nothing to suggest that it’s associated with a new feature or has some sort of secret meaning. Instead, most users suspect that the notification is actually a glitch.
Source: https://www.distractify.com/p/instagram-cupcake-notification
New Facebook Page: https://www.facebook.com/OsmaniTheOttoman/