It happens exactly to the "Let's be naughty scenes".
It's all because Arc had the brilliant idea of updating RenPy, the VN engine the game uses.
Aside from the engine not wanting to load some images that previously loaded just fine (see the "Failed to load WEBP" error message that was so prevalent in 0.9.1), it also messed with the "Let's be naughty" scenes because they are managed by a variable that dictates which outfit the girl is supposed to be wearing during the scene.
It works fine on the first dialogue but in the rest it gets choppy as all hell.
I tried asking Arc to revert the engine back to the stable version he was before, but he's afraid of the swarms of people complaining about some of the saves (made in 0.9.1 and up) being somewhat broken and not loading properly.
So he decided to implement some spaghetti to make it work, hopefully it will behave properly in 0.9.3
Seriously, he gained absolutely nothing from updating the engine, none of the new features benefit him in the slightest, all for a promise of it behaving better on android. Guess what? It didn't do shit.
It's the same with W10 updates, more often than not they end up breaking something right after they release, and the poor chumps we call "early adopters" are the ones that have to waste their time and sanity by being the unpaid beta testers of a product that should fucking work.
Fuck's sake, that's why I'm pretty much always one major update behind on windows. Don't give a shit if it's unsafe, I want my computer to fucking work.