Social media microblogging site Twitter is currently investigating the mysterious disappearance of the world’s most famous selfie. Over the last few days, the site has experienced a spate of vanishing tweets from a number of users; counted amongst the casualties is Ellen DeGeneres’ record-breaking and start-studded Oscar night selfie.

Several Twitter users have voiced their concerns over the fact that several of their posts seemed to be disappearing at random, prompting the social network to launch an investigation into the cause of this mysterious problem.  According to an official statement on the matter, Twitter is currently “researching a bug that has caused some Tweets to not be displayed.”

Several high-profile Twitter accounts have been affected by the bug along with DeGeneres’, including Lady Gaga, The Daily Mail, and CNBC. Fans and Twitter users have also expressed distress over the disappearance of the final tweet posted by ‘Glee’ star Cory Monteith before his tragic death last July.

Twitter officials have not yet discovered the cause of this strange bug.