NPC Spawn Issue: Trap trigger in Velk Lab BM camp

[REMEZ]

https://www.youtube.com/watch?v=Me3B1F62bRs
I get agro around 2:10 -What the hell happended here??

I have soloed this camp many times(BM in velks lab) I know where the traps are and how to avoid them, but today i somehow manage to trigger this trap as shown in the video. There is a trap right around the corner where I stand that I must have been triggered? How the kobolds also came I dont understand as there are no dogs between that trap and my location.

I am not kos here as enchanter with werewolf + collaboration, only traps KOS me on trigger.

Initialy I thought a mob warped, but as I had no agro from earlier this makes no sense. Maybe I trigger the spider trap and then the spider warped and brought the kobolds?

[Sunderfury]

Resolving as video is no longer up and the seems to be a lot of speculation and unknowns.