What is the bug: If you interact with the flame fusion machine, without it’s quest, the boss fight trigger, and after you kill him, you get the reward for the quest.
PS: I created this thread here, because i couldn’t do it at the beta test bug report.
and if you do have the quest nothing happens and it breaks the quest line… even for a beta thats really broken since if you are doing things as they become available to decrease grind even if your not in the area you get a notification to go do the quest line and come the end of the 2nd floor no more quest line