I'm working on a Mac through the Safari browser. Often when I click the three dots in the top-right of a scene and select 'add subtitle', it simply fails to add a subtitle. Sometimes it highlights a paragraph or two of the scene summary instead, sometimes it does nothing. Sometimes I just have to repeat the action a few times and it eventually gives me a scene subtitle. Sometimes it really doesn't want me to add a scene subtitle, I might have to exit the whole project and go back in before it will let me.