Can't say that something is wrong here. Sombra's video is 87 minutes long. That could be enough for grouping up lotta jorms, to reach the pob and destroy it. Remember the Solitaire Metropolis siege? I cut off a lot of video recording, so for you it was only 37 minutes long, but for us it was about two hours. Yes, it was quite longer, but consider the fact that in Solitaire's situation RHA decided to begin with Long-Rage siege. Everything is calculated right. And the message you received in the System chat was just a noticement that the base was -still- under attack.