I´m afraid I have the same prob as @b_o_b
(unintended rhyme!) : Classic CC here, current firmware. Played a good while through Stunt Car Racer, I had checked autosave long before quitting; later today when autostarting, I came to the TOS prompt and no further, with the correct disc being auto- inserted automatically tho; but no auto-start to the true meaning of the word; and manually starting the savegame brought me right to the Stunt Car Racer screenshot at the point right where I left, but no further, the ST was hanging from here, so had to start anew by full reboot, and no save.
It´s no biggie for me, I know normal save works
The fault may be at my end, I may try again with the UNZIPPED game of Stunt Car Racer AND also use a non-EmuTOS (which however has worked splendidly on all games I´ve had running so far).