Sa-Zi-Ri bug?

I noticed the following when I play Sa-Zi-Ri on openMSX: when you press top left on the joystick from startup and keep it pressed (until the end of the test) and when the game starts in stage 1 you press RIGHT on the keyboard, the game fades out and crashes/hangs (depending on the used MSX).

I found this out, because for some reason, my PC joypad always inputs TOP-LEFT after a PC boot...

Can someone confirm on real MSX?