Thank YOU for the amazing game!
Yes, sorry to say, it's a bug - the Prime Minister just repeats her usual "nothing has changed" speech, and nothing happens when entering Jyla's manor.
I tried reloading an old save and recruiting Jyla BEFORE getting the Council Invitations - after that, everything went as expected. I'm guessing both scenes are unavailable after certain events take place that cause the rooms to change.
Thanks again, both for the game and the helpful advice. I don't mind having to restart from an earlier save... it means I get to enjoy the Tomb and Best Girl's House dungeons again! :)