break disc LR blokked by hand brake

I noticed while driving that my rear left wheel is not turning freely and is delayed by the break disc. The disk runs very hot. The last service 20k ago the garage already had to fix this but apparently the same problem came back. Has anyone got the same experience with this? I looked at the cable underneath the car and it has a lot of bends around the axle. The rear right is cool and wheel is running freely.

Is it a closed system or can the be dirt inside the cable. I don't use it much but perhaps of the winter/cold weather/rain etc the cable if not moving freely anymore? Any solution to avoid having it done every 20k kms?

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