Version 6.3.14 TBC

Questing in Zangarmarsh in TBC Classic. Been popping up pretty much since I got here, been getting worse it feels, spams the entire chat box at times. My limited understanding can't find a correspondence in the quest log.

Friend has 6.3.12 and doesn't have this issue.

It has to do with being on a new dungeon quest while using Objective Sorting > By Proximity in Questie Options > Tracker.
For now: Change to another sorting or abandon that dungeon quest until you're doing that dungeon.
Will be fixed for next release.