Before downloading fresh one, I copied all my saves somewhere else and then deleted all Season 3 saves from Game Saves folder as well as App Roaming folder.I wonder what is making mine different? I downloaded the full game and applied Scrappy's fix and it still locks up at the doctor :/
Downloaded a new one applied Scrappy's fix (that solved doctor crash and freeroam stuck), then pasted my saves in game saves again. Using the automatic saves, I continued the save just before we see Sage in main hallway. Completed all tasks and boom, Talk to Sage option appeared.