Screen stays black when leaving Atlas buildings

I don't know if this is common or not... I have a problem when after leaving some buildings, and it seems only in Atlas, the screen stays black for 30 seconds or longer. The game is active, I can hear my character's sound effects. I can begin moving or whatever, but the screen is still black. It then clears up.

It's not all places, and seems to be mainly in Atlas and only when leaving a building to the main map. I can list for sure the Atlas hospital and City Hall where this happens. But like I don't think it happens when leaving Vangaurd HQ or AE.

It could be a matter of my system, but it's very specific places.. shurg. I'm on a Dell Hackentosh running Snow Leopard.

This happens when there are network delays. It happens to me a lot when I'm paying base rent on Virtue for instance. It's not a Mac-specific issue.

I used to have similar issues when exiting specific buildings; Studio 55 was a frequent offender in this regard. Moving a short distance (blindly) or entering the /sync command (again, blindly) would always fix it for me.

Go get this problem going in and out of any type of build :/