I got a pop-up from my addon saying Sthaarbs just spawned. I phase dove and went to the platform and there was no Sthaarbs. Then the platforms dissappeared completely and I’m standing in mid-air. Add to this the pet class bugs where pets fall off and disappear. This fight is extremely buggy.
Also, please please add a way to get off the platforms once you’re on them. The gate to transport Sthaarbs if often up when he isn’t spawned, so I get tricked into teleporting up there. Then I have to jump off and die in order to get off.
An Evoker dying from a fall? Really?
Feels like your AddOn was really late with the notification.
- I would always check if he’s up there and what his Hitpoints look like when you’re in front of the portal in Untethered Space.
- You can even see the remaining HP when you mouse over his Rare Vignette on the map.
But there’s indeed some weirdness with the platforms and the portal remaining active when Sthaarbs was already defeated.
So, they could add some aura as soon as you enter the portal to the platforms, and when that aura gets removed (fight ending, platforms disappearing, etc.), it could immediately apply a parachute slow-fall follow-up aura.
Not all people are posting with the character they had their issues with. 
It’s not on my Evoker silly head, did you not know that people have alts?
I always optimistically assume people are able to select the correct alt before posting. So that they don’t make actual diagnosis impossible.