Hi!
I followed the Vailian Trading Company questline and blew up the powderhouse at the Brass Citadel. I went to the trial in the palace afterwards, where I lied about not seeing anything. After the scene I wanted to turn in a quest with the Queen so I went to the rooftop. In dialouge with the queen the Huana questline regarding blowing up the powderhouse triggered, and as I blew up the powderhouse in the Vailian questline the Huana quest automatically completed and made some ripples in the other factions including Maia leaving.
This is very weird.