osman - no ROM/RAM check on recording movie, corrupts (?) NVRAM

[xy2i]

1. Load "osman".
2. Record a movie.

Expected behavior: The game loads, ROM/RAM check.
Actual behavior: The game loads but this message appears on screen:
"THIS PCB IS NOT KILLING."
Even after stopping recording and loading the game again, the message persists.
It appears to be linked to the nvram: clearing nvram/osman.mv makes the game boot fine again.

[vadosnaprimer]

Clearing nvram is one of mame's original requirements for stable playback. Might do something about it someday.

[vadosnaprimer]

Also, elaborate, does it require deleting nvram each time you start record/replay, or it also messes with state loading/saving? Like, you have to remove it several times during your session.