The last gallery item would be Alex's new event, otherwise you could be missing Jester's sidequest scene from 0.21
Sorry, wrong update, alex's new scene is in 0.23
The missing scene in the gallery WAS a bug in 0.22, I'm pretty sure it's either Jester's scene or the new Clint scene that was added in 0.22
I checked and it was actually the jester scene was Missing.
