No i haven't updated anything, used any mods, or otherwise messed with things. I got the shower scene with Dalia, the topless photoshoot with Penny etc but they're grayed out in the gallery
Well, I have no clue then. Maybe a Ren'Py bug? It's an elusive issue, I've seen other people report it but I was unable to reproduce it so far. If this bothers you, you could use a mod to unlock all lewd scenes.