@Aliyavana Thanks for the tip! It did work! I stood still (no movement, no skills) until I was getting damage from the aoe/adds (3-5 seconds after teleporting). Thanks again, still, it shouldn't be happening.
when you take a void portal, dont move for a few seconds and it shouldnt do this
On my second try I didn't move at all after taking the portals and just attacked from where I was dropped, but still glitched out near the end. She was almost dead, I took a portal up to a platform, but when I got there the boss, voidmothers, and Arana were all gone. The arena looked blank and featureless and the textures were all low res. I stayed up there a minute or so, doing nothing and with nothing happening, and then abruptly fell through the floor and got kicked from the server for spamming.
Glad they've allegedly fixed this now.
PC NA, CP2500+. Character creation is the true endgame.