Flight Trainer Stormwind/Orgrimmar not working

Description: Cant learn spells

Current behavior: NPC 43769 Bralla Cloudwing and 44919 Maztha cant learn spells

Expected behavior: you should learn spells

Steps to reproduce the problem:

1. Click at this NPC try to learn

TC hash/commit: 71c0e948

TDB version: TDB 434.22

Operating system: Windows