Was doing World PvP in Drustvar. Eventually killed enough to pick up the Horde Slayer quest, and completed it to gain the Tracking debuff “Bounty Hunted” that prevents you from flying to make things fair. I used the flight master to go to Stormsong for a WQ (kept both Alliance Assassin and Hunted debuff as intended), then hearthed to Boralus. I lost my Assassin buff (that’s fine with me), but kept the “Bounty Hunted” debuff that prevents you from flying. Logging out and back in fixed the issue.