The leader should not twist bass fishing unless your tippet is too small for the fly or the fly is not aerodynamic and is spinning during casting. Occasionally if I am nymphing on a stream and I am doing roll cast mend drift , roll cast mend drift after while i will notice a few twists in my leader which are easy to take out by pulling it through my fingers.
What ever is causing the twists is not a direct result of using a furled leader