Odd spawning behavior in Rikti Invasion leading to group drift

[Trance]

This morning I participated in a Rikti Invasion in Steel Canyon on Indomitable, and when the Rikti began teleporting in we all met up at Posi/Valkyrie. A low-pop server plus a non-peak hour meant that the turnout for the event was not impressive, so we weren't getting port-ins on a massive scale or anything, but enough that we'd occasionally get a Heavy Assault Suit.

 

What I noticed, though, was that the group was drifting away from the meet-up point, in the northeast direction, with each wave. The reason for this was because the Rikti were porting in only to the northeast of our group, and never in any other direction. We ended up getting quite far from the trainer by the end.

 

Was this just an incredible stroke of RNG? Given how many waves it was, my suspicion is that a bug might be hiding somewhere in the spawning code for that event.

[Trance]

Since posting this last month I've been able to participate in a half-dozen more Rikti invasions in various zones, and I can say with a great degree of certainty that this is not RNG's doing. I've been paying close attention to which direction relative to the players the Rikti are spawning from, and it is, without fail, to the northeast.

 

In Peregrine Island in particular, which has a diagonal urban layout spanning SW->NE, the meetup point in the parking lot of Portal Corp led to the Rikti spawns drifting into the police drones flanking the trainer and robbing us of a good chunk of kills before enough people in the group figured out to retreat back to the parking lot to keep fighting.

 

Can anyone who isn't on Indomitable confirm this behavior?