This only belongs here because it's fun and while technically a bug, not something that needs immediate attention. Basically, I just wanted to say "Check out my big-@$$ halo, melon farmers!"
To explain: It's just the halo that's the reward from the Wastelands Wonderland duo brief, but this is in the Spectre T1 challenge and after I turned into him and got big and changed back, the halo stayed Spectre-sized.
I've also seen the opposite: In cutscenes the Halo of a teammate shrank to the size of a Kippah and was almost touching his head. After the cutscene it had normal size again.