Just a thought, has the file size for Star Wars crept above 4GB?
By Default, HandBrake outputs MP4 files with 32-bit chunk offset atoms (stco). This means that if the file grows above 4GB, it will be rendered useless.
Enabling this option [large file size] will force HandBrake to use 64-bit chunk offset atoms (co64), however some devices do not support this.
(from https://trac.handbrake.fr/wiki/SupportFAQ)