I had this with gundrak.

I did nexus hc as the first random, after that I got oculus. I teleported out and went to gundrak instead.
After that gundrak was cleared i did another random, I got Utgarde Keep. After that was cleared the next random was Gundrak. I was thinking yay, another 7 badges in 20 mins. wrong. I was still saved. The trash was back, but the bosses were missing. Apparently they can't be done over and over with the exact same grp.