Here's the rom of the elusive pseudo-random bug. I tested it on the krok cart and while the data was wrong still, it remained constant all the time. Probably an effect of how the superchip is done on the krok.

To see the bug in action on the emulator (I've just been using Stella) start the emulator, start the rom. Notice the weirdness regarding the player. You should just be seeing a single copy of the missile sprite for the player in a squarish formation. Offhand not sure what the color is suppose to be, but you'll notice it's affected as well.

If you esc out of that back to the rom list and start the rom up again, you shouldn't see a difference. It'll all look funky but in the same way it was before.

Now shut down Stella completely. Start it back up, and load the rom again. You'll probably notice the player size/copies/color is different. It'll stay that same different configuration til you shut Stella down completely again.