I had just updated and I went to 629 via a lab portal and pressed the red button to go to 628 and all I got was a black screen? After resetting my save (All those precious hours, lost!), when I went back to 629 by the same method and pressed the button again, I was placed in front of the portal of 628. However, when I go to 628 first and press the button there, I can switch to 629 and back without landing in front of 628's portal. I know the the black screen thing is a bug, but how much of the second thing is intended?