Ya, so I had a problem with my playthrough on the last update where I'm pretty sure the scene where you could sneak up on Grace was bugged for me since the scene only showed up once in the early game and never showed up again even though I went through the whole game. Then spent time just going to her room, sleeping, and skipping time (with no luck). (I read that the scene where you sneak up on Grace is the way to gain sub-points for Grace which I could never get in my playthrough).
I want to know if this was a bug or if I just got "really" bad luck with the RNG.