Have i got a collapsed brake pipe??

[BLUETHUNDER]

I've noticed sometimes,that while driving in town traffic for a while the vehicle starts to drag as i am driving.Once i've stopped i've noticed a burning smell.On checking the hubs,my right rear is almost impossible to touch. Its that hot.

I've had the H2 on a ramp when things have cooled down,and the rear right free wheels as normal. Could it be a collapsed rear brake hose??. In effect acting as a shut of valve when the fluid neads to return??.