You might need a firmware update? Also wouldn’t surprise me if Disney did something that wasn’t kosher with the format specs and the Sony is hiccuping on it.
These things never happened with HD-DVD. 😛
I have the odd DVD or two that seem to spin faster than anything else I own, or at least they make the player really noisy to the point you think the disc is going to fly out of the machine and kill you. No idea what causes it.