I skipped the voidwoken drillworm (SPOILERS)

[Ka-mai19]

So I get to Alexander the first time and get wiped by the voidworm. In my second attempt I stun spammed Alexander until I managed to kill him from afar. Then I took care of his other minions.

To my surprise, the voidworm didn't show up at all and the encounter simply ended. I don't know if it was because I didn't get close enough to Alexander to trigger the worm, or because my stun spams stopped him from summoning the voidworm.

Maybe it's just a glitch?

[Jamen]

Engage the rest of the npcs, mage on upper left and Marksmen on upper right, he will show up after they have been dealt with

[Ka-mai19]

I already took care of em' The entire encounter ended with all the enemies dead in the area, with no appearance of the worm.