i found that it's someting wrong with the game Blazing star. Other games are fine for MAME High Scores, but only blazing star has problem. the hiscore of this game is store in nvram, but it couldnt update nvram, no matter run by launchbox or run directly by mame. Theoretically, it will not upload any scores to the leaderboard, but it did one time. And you can check the leaderboard, so many guys' records are the same: 250000. Is it a bug of this game? Mame and romset 0.254
i tried many times to run the game by mame directly, and found that it can update the nvram of blazing star occasionally, but it doesnt most of the time. It is irrelvant to bios.
Debug 2023-05-06 08-44-52 AM.log