I think Audiofankj has it right. I'm guessing that the CDs that are giving you trouble are multi-format types, possibly dual-disc. Your CD player is trying to read TOC on the disc and can't read it. Your player is smart enough to know that there is a disc inserted, but since it can't read the disc, it thinks you need to turn it over. My Resolution Audio Opus 21 won't read the one dual disc CD that I own (Snow Patrol).
Enjoy,
TIC
Enjoy,
TIC