Welp, since here seems to be the place to inform Bungie of possible bugs in Destiny 2 Beta : With the game I started with a Titan, after defending the plaza with Zavala, we run to Tower North to join Ikora. But when I arrive there, where there is supposed to be Cabals killed by Ikora's nova bomb, there were no enemies. No Ikora. No dialogue. The big black door in front of the speaker was open, so I entered. No enemies. I ran up to the back where Amanda gets us, and THEN the dialogue of Ikora started. I rushed back to the entrance but, surprise!! The big black door was now closed, with Cabals on the other side. Cabals that need to be killed in order to open the door and continue. I was stuck. I had to log out and redo all the mission up to this part. (The second time it worked fine)