I had started a new save, Digested Duncan, then move on the Ollie's vore scene, while Ollie was laying down Duncan shows up.
Viewing post in F(r)at Party v0.4.1 Public Release :) comments
Ah I think I may have figured out what happened. I think somehow the code that flagged Duncan as digested(which Ollie's scene cameos rely on) only gets flagged if you have different settings. Not sure when I'll upload the fix, but I think I may have identified the problem I just gotta scrub through a bunch of code to find exactly where it went wrong