I have not been playing much since the last small update but for the last 2 days I have been playing lots and I am experiencing the exact same thing as many others are in this thread. The flights start off normally and everything is nice and smooth… as they have for a long time for me. However by the end of the flight I have stutters all over the place. I will try some of the things concerning the cache mentioned above but this feels like it is more than just that.