King of Fighters (98/02) drops inputs at the beginning of the rounds

[pakoito]

This is a weird one. In the two KOF games I've tested, kof98 and kof2002, I have to "wiggle" the keyboard controls a little because some of them seem stuck at the beginning of each round of a match.

I have also seen that in KOF98, when pressing the Start button on the Team Order screen, the smiley faces will appear and disappear as if there was a turbo button effect for the Start.