Bonjour
Well, the sticky brakes can be several different things:
1. A glitchy contact in the potentiometer (the thing that measures how far the pedal is pushed)
2. Deformation of the plastic cover.
I've experienced the second of those. It happened because, well, I have big feet and I use left foot for brakes and right foot for accelerator. When I rest both feet on the plastic cover it eventually starts to compress it, just slightly. When that happens, the part of the plastic cover that's acting as a pedal stop is pushing the brake pedal down a little bit. Just a millimeter or two, but it's enough to trigger the sensitive potentiometer, often to a point where it flutters between 1-2% and 0.
The solution for that is to try and be as light on the feet as possible and don't let them rest heavily on the plastic cover. It's also possible to cut away some of the plastic from the pedal stop, to give it more compression freedom before it starts acting on the pedals. I've also been thinking about having something else over the cover to rest my feet on, but after cutting some plastics away the problem is more or less solved for now.