Thanks , dink
Wasn't aware of it till today 
I used to play Contra all the time on NES , and then on Nesticle and Fceux for years , but for some reason never got to sit down and play the arcade original seriously
Feels much different than the NES port for sure
Well, it is, I think, the only thing wrong with the emulation, and goes away when starting a new game, so its not too bad.

Don't forget to check out Super Contra, and Contra: the hard corps - for a good rush! (both in fbneo, if you wish)
best regards,
- dink