Messages appearing and disappearing

[Android Central Question]

A pop up message appears long enough to read then disappears. Being used to harass. How is this possible? Is it a phone capability? Or is it a FB Messenger possibility? No one seems to know.

 

[B. Diddy]

Welcome to Android Central! Which phone? It's hard to say without knowing what the message says. It might be some popup notification from an app. If you can manage to get a screenshot of it, or a video of the screen while it happens, that would help.