I've completely cleared Storm Peaks of quests and this breadcrumb 'The Earthen of Ulduar' (ID: 12929) slipped through the cracks and is no longer available to accept and complete. It doesn't appear on my map but doesn't seem to get correctly shuffled into the 'completed' or 'unobtainable' categories for the Storm Peaks zone.

Wowhead link

https://www.wowhead.com/wotlk/quest=12929/the-earthen-of-ulduar

Questie & WoW version

Questie v8.9.0
Wotlk Classic

Fixed in bdf0441