There are some reports of seeing unusual image in their Facebook mobile app that appears to be rocket-shaped icon next to the main news feed icon.
And when you try to open it, it will give you a different version of news feed. A news feed that shows various posts from people and pages that are not part of your Facebook network meaning people and pages you haven’t make friends with or liked.
This disappearing and reappearing rocket-shaped icon is part of Facebook’s latest news feed experiment.
This type of news feed recommends contents that are related to your interests. It somehow helps you to extend your network and explore other Facebook communities.