Filmmaker S.S. Rajamouli on Thursday said the unfortunate leak of the trailer of his upcoming magnum opus "Baahubali 2: The Conclusion" happened due to a "bug in Facebook".Talking to the media here at the trailer launch on Thursday, Rajamouli said the trailer leak happened due to a bug in Facebook. He did not elaborate on it any further."Piracy is different, and a leak is totally different. We are still trying to find out how the trailer leak happened. It is very irritating for the entire team but we can't blame anyone without knowing everything about the leak," Rajamouli said.The trailer was supposed to be launched at 5 p.m. on Thursday. However, following a leak of the Tamil version of the trailer, the makers were forced to release the trailer of all the versions online.Talking about the second part of the franchise, he said: "Unlike the first part, which was low on emotions and high on grandeur, the second part will have both factors in equal proportion."Rajamouli said he was tense while working on the trailer, but the output is satisfactory."When I saw the trailer with Keeravani's background score, the output was beyond my expectations," he said.The film starring Prabhas, Rana Daggubati, Anushka Shetty, Tamannaah Bhatia, Ramya Krishnan and Sathyaraj is due for release on April 28.