It should have just happened after that and unlocking the cuddle buddies and having the talk with Slate. You unlocked goblins having unique looks like everyone else, right?
Might send a bug report with your save file as it sounds like everything should have been done.
You can use the skip to chapter 3 and be at the same point you should be at with everything you could have done in the prelude done. But send that bug report along with your save so we can check it out.
