This is related to an already confirmed bug, but I'd rather be safe and waste my own time then it potentially being missed. The red-haired npc near the quest wall abandoned us.
Map: 048 Keeper's Tavern
Event: EV 004 Quest NPC (16,14)
Issue: Similar to what happened with Wynn and Uyae's quest markers, a blank event was added and left as the newest entry preventing his event from being called.
Couldn't properly test on 75.4, so it's only observed on VX Ace.