Hello,
I don't know if this behavior is normal or not but I've encountered this issue in Chromie Time, Northrend (Dragonblight zone):
The Dialogue UI BTWQuests button shows "unnamed" (Screenshot 1) and clicking on it still shows as "unnamed" in BTWQuests panel (screenshot 2) but actually the quest line is part of the Dragonblight storyline "Gli Stormi dei Draghi" ("The Dragonflights" in English) (screenshots 3 and 4). As I wrote above maybe this behavior is normal as BTWQuest addon doesn't give a name to the quest lines or maybe simply because the single quest lines don't have a name, I would not know. Also completing that storyline is necessary for a achievement https://www.wowhead.com/achievement=35/might-of-dragonblight
Would it be possible to open the BTWQuest panel with the full storyline (screenshot 4) instead of the single "unnamed" quest line (screenshot 2) when clicking on Dialogue UI BTWQuests button ?

Screenshot 1

Screenshot 2

Screenshot 3

Screenshot 4

Thank you very much for fast fixing the issue with 0.4.8 c version release.