It's version 1.1 now and it's still not fixed for me. I tried something different today and made a new character... Went all the way past The Heist (didn't do any side questing here) which is quite a tedious quest imho. After that I tried to approach the still completely unknown area from all sides to trigger the call. Guess what... NOTHING! Reloading it again and again, quitting the game, reloading afterwards, nothing works. It's like the game decides if to screw you or not the moment you start the character and won't change its mind later on. 1.05 maybe fixed something, but obviously not for all people and obviously nothing for people who already walked past the building (sorry for walking around the map I guess). I am fully supporting the developers and am sure they work hard on it, but please, fix things that people tell you about on the forum so they can do it even though they don't delete their whole save file or something like that. Just reset the quest for everyone who doesn't have it as finished yet and set the trigger for the damn phonecall.