WowAce

What steps will reproduce the problem?
1. Get to the Netherwing section of Shadowmoon Valley in outlands and receive the Dragonmaw Illusion buff.

What is the expected output? What do you see instead?
Seeing FlightHUD is expected. It vanishes when the buff comes into play, dropping mount and resummoning does not bring FlightHUD back up. FlighHUD returns when you fly out of the area and lose the buff.

What version of the product are you using?
v0.7.13

Do you have an error log of what happened?
No error was given.

Please provide any additional information below.

This is a regression. Usually people's buffs don't change while flying, but it sure does in this case. I know exactly what's causing this and I'll get it fixed ASAP.

Barf

After your comment, I looked into this a little more closely and had a few rare instances where I left the Netherwing area, but the drake stayed with me. It's not the Dragonmaw Illusion you'll need to worry about it's the Dragonmaw Nether Drake Buff http://www.wowhead.com/?spell=40212 which replaces your current mount buff.

Sure took me long enough to get to this one.