I know that, and that's what happens with the scenes by the pool with Elisa, or in the shower with the mom, for example.
But in this case I've already explained what happens: you can go there, but there's nothing to do and you immediately return to the map screen as soon as you click once. One thing is progression and scene variation, and another is getting nothing from an event that is supposedly already unlocked. You can talk to Amelia and suggest going there, the game actually takes you there, but once there the event doesn't trigger at all.
Anyway, I'm sure it's just some coding inconsistency and I'll have to try it some other time, when I can play again.