Hmm... If sounds are missing, that's one thing; but if a visual element like the "Player 1 Get Ready" is missing... That sounds like maybe it's not even emulated, but just ported.
I don't think it's a porting issue. Most romsets of Burnin' Rubber/Bump 'n Jump are missing the "Player 1 Get Ready" after losing a life, so I think it was something added to the Midway version. It's definitely emulation.