Shuttlecock without cork attached

Found this in one of the badminton halls I frequent, am now wondering how often this occurs eg cork cames-off during play?

Personally I have only came across (not caused by myself) such a phenomenon on only a few occasions over many years of playing badminton. 

Usually caused by a extremely hard mis-hit when the edge of the racquet just happens to hit the corner end of the shuttlecock - from during a smash. 

Anyone else seen this resultant from a different stroke??

Cork came off during game