OSX 10.9 Streaming bug - 'Account not linked'

Trying to use the in-game stream feature, upon clicking broadcast options I encounter this:

http://i.imgur.com/WkxM1IV.png

Which, would be fine, except I have already linked the account.

Mojang website: http://i.imgur.com/Rbg8HFD.png
Twitch website: http://i.imgur.com/s0gQY0r.png

Solutions I have already tried:

Logging in & out of the launcher
Closing the game & restarting
Closing the launcher & restarting
Staying updated to all of the bugfixed snapshots (latest is 13w48b)
Removing the link for the twitch account and linking it again

None have worked.

Thanks for reading,
Fuscate