I have several arcade games that the state is saved just fine when you exit, but when you go to replay/reload the same game, the audio is missing. (for example: 1941: Counter Attack)
Then I have games that when I reload/replay, they don’t work at all - the video is all messed up and the game isn’t working right (for example: Dig Dug, and other games of the same era and by the same company).
NOTE: Going into the menu and selecting “Undo Load State” has them working again. (But then you have to wait for any game initialization, and the high scores are reset (I think)).
This only happens in certain games.