I had a flare up like that with a cope RMVB. I sent it back, he gave me another, it flared up too between the 2-3 shift. I sent it back and got an A&A brake from him, problem solved. I now have his latest RMVB and no issues with flare up.

http://www.youtube.com/watch?v=aIxaesJ190U

http://youtu.be/lCZAaN7fFLg