Just want to confirm this bug for me as well (PC). With mission story guidance off, the prompt to talk doesn´t show up, not even if I do the story the exact same way as if the guidance is on (1. listen to conversation, 2. get form, 3. get board member´s disguise). The prompt is there if guidance is on.
Other mission story related bugs I´ve had (in both cases guidance was off):
Dubai - when doing the “Bird of Prey” mission story, after showing the picture to the assistant, she told me to follow her but wouldn´t leave her desk (reloads didn´t help, though I was able to complete the MS regardless by going upstairs myself). Subsequent re-tries have worked properly so far (both with guidance on and off). Also, on that particular occasion, she had a water bottle “stuck” to her hand (had the same bug with Stuyvesant and a glass of wine).
Mendoza - in the wine tour mission story, the lead winemaker wouldn´t go start the tour after tasting the grapes (restarting the game fixed it, but I haven´t tried since to see if it repeats itself or not).
Edit: 3. Mendoza - the option to interact with Diana after disposing of the upper floor guards was missing, hence the mission story (guidance was off) was not progressing properly. Happened only once so far.
Additionally, in Dubai, instead of hanging, I had 47 fall off the building after scaling some of the railings (will have to check which exactly).
Also, having the invisible laundromats in Chongqing just like everybody else it seems.