I have all 4 leaders at level 4 and I've got Magdalene's scene, for Worlia, as soon as you take her to swimming, the screen goes black. For Ailluin you can't do anything with her after talking to her, though I'm assuming that's because I haven't completed the about racism quest. With jessie, as soon as you talk to Fang, your teleported to the south dudgeon with free roam with fang's sprite with a cg of his body to the right. Once this happens you can't do anything, you can use a teleport stone then things go back to normal, but fang is stuck with his usual line and nothing happens with Jessie.
I'm playing on windows.
Another thing about the "about racism" quest for mirel, I've talk to lilina however when I talk to mayor orcel nothing happens, I haven't gotten the 4some with the elfs. I don't know if that has anything to do with it.'
the same thing that happened to jessie just happened to kay and her smoothie picnic event. Instead viewing the scene it just takes you to the river near treatmen. You can still roam freely as well also if you try to view the scene through the cg room, it just does nothing, it doesn't even say, scene not unlocked