Positron TF: Only one shadow showed up

My searching is poor, so forgive me if I'm reposting something that's known. I didn't see it in known issues, either.

I did the new Positron with some friends on Sunday. When we got to the last mission we kept getting killed in City Hall's lobby area. Anyhow, I noticed I had Hyperphase, so after we reassembled for the nth time I went in, phased, and ran to the hallway/stairtop, drawing the Circle enemies with me.

The cutscene triggered, and my character was the only one that appeared out of our team of eight.

When we finally made it down to the bottom of the stairs, there was only one shadow version of any of us (my character). We proceeded to wipe out the end of the mission.

We laughed, said, "well, that wasn't much of a fight but we earned it," and it got /bugged. I've not tried to repeat it yet. Not sure how "exploitable" this is, especially since getting through the front door is such a horrible pain anyhow, but still...

I found it easy to counter the CoT ambushes. Front door and city hall with no deaths, 8 people team. And we were only in 6 in this part, all melee, because the two trollers were shopping.

Anyway, back on topic, I did the TF once and all of the 8 shadows showed up (nice touch, they even had the same SG names as us).

We got trounced by them the first time because three of the scrappers rushed in without waiting for the 2 /rad trollers, so I went in with my scrap too (we were 6 scrappers+2 rads). They hit really hard!

The shadows were real easy the second time, I just popped some purples and waited for the rads to anchor first, I didn't even get hit. Ok not real easy, they took quite a while to kill and two of the scrappers died, but no big deal.

I think it was some isolated happening you had (only 1 shadow), normally all the shadows appear from what I've heard from other people since I only did the TF once.