I had new cables and housings put on my bike last night by the lbs. I noticed immediately the rear brake didn't feel right and they took it back and told me something was off with the ferule and then it felt fine. Rode for a few minutes last night and noticed the the housing itself was moving when I pulled the lever. As in i pull the lever and the housing itself moves toward my brake lever.

It didn't appear to be doing that on the front brake.

Obviously I'm going to take it back into the shop if there is an issue but I just wanted to post and see if anyone had one of those "that's common and its because of x,y,z" statements before I go back to the lbs for something silly.