I have this strange experience with 4K UHD discs: I have Sony UBP-X800 4K player and almost 8 out of 10 times, the brand new 4K disc has a minor playback issue (freeze/skip/choppy) when played the first time; but when I stop and play again, the issue resolves itself. At first, the issue appears to be with the disc itself: I rewind back to the scene where it happens, the issue repeats itself at that exact same scene but when I press stop, and re-start the disc and come back to that exact same scene, the issue is gone. This happens almost with every new 4K UHD disc. It feels almost as if the player is not fully initiated with that brand new 4K UHD the first time, and when played the second time, it plays fine. I wonder if anyone has the same experience with Sony or any other player they have.