Hundreds of people started talking about it when weird thing happened with Facebook cover picture removed spontaneously. The problem emerges to be a step by Facebook to uncompromisingly crack down on pictures that are supposed to be promotional.
People encountered the situation when the message appears to pick some unique picture for timeline cover and not to use the content that is uses for some sort of commercial or promotional purpose, don’t use the image that’s already copyrighted.
Moreover Facebook’s policies about pictures and cover photos are not change. Terms of services states that cover should unique image that represents your Page.
Nobody knows what is the mystery behind this is step taken by Facebook but its users really feeling weird about this unannounced stride.The picture is just removed from the cover’s position but not exactly from the album of cover pictures.