To reproduce: start with demo device. Remove all digital channels. Make sure the window is larger than the space allocated for analog channels i.e. grabbing the view and dragging it up or down stops before the channels become hidden by UI chrome. Now, grab the entire group of analog channels and drag it up. The channels will start thrashing across the view.

If you do this with just one channel, it bounces back after you release it, which is the expected behavior.