probably NOT actually a bug, but to bring it to someones attention Norma is NOT in her tent. Verified by 3 players.

Even Old Merchant Women have to go to the bathroom. (Read: Especially Old Merchant Women)

NPC's die inadvertently sometimes because of careless pvp or monsters that are unleashed/lured accidentally into the city-proper.

Likely on the reset, she'll return.

Besides, I've seen her fight before - she's a tough old broad!!