Pylon isn't interactable. The dragonkin just disappears and the only thing in the room is the exit door option
If this is what i believe it is - it isnt actually a bug you've just missed a small step *warning* small spoiler- You're currently still inside the dream - you need to deactivate the pylon in the real world - talk to hannibus to disconnect from the dream first
Dm me your ign if this doesnt work and you still believe its a bug - i'll take a look