For 2 years, I have had this .song with one consistent problem. No other .song shares this issue, and nothing I have tried has fixed it. After some time working on it and exporting a few rough-mix mixdowns, at some point every exported mixdown whether it be .mp3 or .wav was blank. Empty with no audio what-so-ever. Removing every plugin doesn't fix it. Loading and older save of the .song doesn't work. It is only with this one .song file. This issue has persisted through every update for the past 2 years, and throughout several different versions of Studio One, and different operating systems. Perhaps it's a glitch or corruption to that one particular .song file, but too much effort, time, and creativity went into this song. So much so that it isn't something I can just re-create perfectly.
iMac (21.5-inch, Mid 2010)
macOS Sierra Versions 10.12.6 (and all previous versions and OS for the past 2 years)
Studio One 3 Professional 18.104.22.168392 OSX x64 (and all previous versions)
AUDIOBOX USB Interface