My kid beat the game a bunch of times, and at least three times it hasn’t registered the win (it doesn’t show that he can try the next stake). We’re playing on the Apple Arcade version, and one detail that feels important: I’m playing on the first save profile and he’s on the second one. I’ve never had the game fail to register a win but he’s seen it at least 3 times (once on white, red and green stakes).
I double checked that he’s never using seeded runs, also.