After updating to 0.32, the problem seemed to have disappeared. But I did notice that when capturing Thundergirl, she would escape early for seemingly no reason.
So actually I seemed to have encountered a different bug with this questline and didn't realize until now. When I lured Rosethundra into the room, I didn't get to use the special rope on her, it just went straight to the scene with Mason and Regina, trapping her. It said I unlocked the scene multiple times when interacting with them, even though it's not showing up in the gallery and Regina said I could keep the lamp, which doesn't show up at the house.