It's on my liberated borg char. During beta, I saw some of my BOs doing it but since I always hit the badge, I was cool with the background thing. Now though, my character is doing it as well. I was wondering if infact it was because of the character being borg, or if there was just some minor detail I had overlooked.
Animation bug, sounds like. Although that must be annoying for you I'm actually impressed they took the time to do several animations for alternate characters like that. Possibly optional in the future? In any case, send 'em a ticket if you haven't already just so they're aware. Probably not a lot you can do short of tooling around in your character's *.bin or *.cfg.