Hi there, happy you enjoyed the game, ChadBoi.
1. I'm not too sure about other android phones since L.T.A. is basically a one version fits all. I'm not in the position to run/test the game on so many different devices but I do test the game on Android over here before I release them. You're the first person to make me aware of this issue so the problem could be on your side.
2. I only add the bigger naughty scenes to the gallery.
3. Quite a few side characters will get more content in the future for sure. In most cases, their rooms/journal pages are done.
The thing is that there are already 24 girls in the journal that are pursuable and require a bit more attention before opening up more stuff.
That's because I don't want the world to feel empty and I don't want to make things complicated.
4.It is normal to have locked scenes/images in the journal after a single playthrough, the reason for this is simple: there are variations, there are different character paths(good/dark routes.), there are events that do not appear in the journal at all and there are hidden endings.