Your min angle and max angle seems weird. It should usually be symmetrical except for a few special cases (which I dont know if the plugin supports).

If that is not the problem: Did you check your world update rate? I had a problem recently that laser scanner flickers randomly when the world update rates (real time update rate and step size of the whole world) are non-standard (real time update rate = 1000 and step size = 0.001). I havent found a solution yet. But in case you dont need the update rates to be different you can try this solution.