180/360 degrees spin – is something unpleasant and annoying, but unfortunately it is natural (as I understand, we are talking about spins on steep descent in corners, otherwise it is something new and probably a bug). I have explored these spins in detail and conclude that they are induced by magic helper forces that maintain proper bike lean. In real life these spins are simple skids that leads to immediate fall, but arcade mode prevent falls by supporting bike with magic forces. On flat surface, when weight distributed uniformly among wheels it leads to drifting, but on steep terrain in corners 180/360 spin happens. If true balancing approach will succeed the problem will be solved on its own (no magic forces – no magic spins), otherwise I will think how to get rid of them in arcade mode. For now I can recommend to lean back and down to pass such corners safely. Good luck!