That turned out to be a problem with how the original quest engine was written over a year ago. But I fixed it! New quest engine, now with a failsafe abandon quest function. The Flare quest should work as intended now, I've done a few tests and it seems fine now but just incase it gets stuck again you can abandon them and reclaim the quest from the original npc. Additionally, I updated the UI so if you are playing on PC in any aspect ratio it should dynamically move the adventure log to the left, and on the right you'll find your current stats (just to balance the screen)
Let me know what you think!