Hey, I just played through chapter 4, but I noticed a few bugs. First of all, you can start the scene with Siegfried about the doctor being the resistance leader before you actually find that out, so that spoiled me a little bit. Second, even though I picked all of the pro resistance options, at the end we picked the circus instead without even being given the option. Finally, even when the chapter "ended" it just kept looping back to the last scene instead of sending me back to the menu, so I'm not even sure if I really finished.
I know it's been out for a while. but I haven't seen anyone else say anything, so I thought I'd leave this here, hope it helps.