This is the first Dual Disc I purchased, it was cheaper than the CD version so I thought, what the hell, why not? Problem is it won't play in my damn Sony XA777ES.

This is a first for this player. It is often slow with black discs, only ever had a problem with one CDR, never a problem with retail CDs before. And no I didn't have it on the DVD side.
It hangs on the reading TOC and doesn't resolve anything. It does recognize it is a CD but goes no further.