Quoted from chippe01:Spider-Man Home only has 3 multi-ball modes, but it seems I am constantly in multi ball.
That's because some Stern games, like Spidey, allow piggy-back multiballs.
Start with Doc Occ...use you free ball time to build Black Suit and then start it...and you play both at once.
Many other titles - once you are in some MB mode...the others are NA until you drain down to 1 ball again (like Xmen - always one at a time).