The audio of the file is eac3 which is not in the device profile so when transcoding is on this will cause the file to be remuxed to change the audio codec. Not sure how it is transcoding when transcoding is disabled in Device Settings, if the same device profile is used for multiple devices and the file is played on one of the devices and transcoded then it will be available transcoded for all devices that use this profile so this could explain it. You will need to make sure that transcoding is disabled on all devices using the Conceiva Mezzmo (Android) profile to ensure that files are not transcoded and re-used. You could also add the eac3 audio codec to the matroska container in the device profile.