Yeah, more subtle that one as it looked very much like it was working anyway, but wasn't.
For the original sets some of the glitches were clear (just watch attract mode, see the corrupt tiles on your plane when it loops at the start) while others weren't (most of the enemy behavior was wrong) This is because the MCU simulation we had was just a crude case of returning a fixed string of data (the real MCU is a lot more complex)
The bootleg appeared 'mostly ok' but according to some expert players of the game was not quite right either because the bootleggers had missed some things or implemented them their own way. It's how the bootleg would have played if you were familiar with that, but not how the original played.
So... this is the first time the ORIGINAL game is properly emulated, running the ORIGINAL Mcu code, so it should now be correct.
Also note, this isn't Caps0ff in this case.