I played through a few more times tonight and wasn't able to make it happen. The most likely explanation is that I actually lost the game and my stats were reset as a result.
Viewing post in Breaking Gauntlets jam comments
I think it’s still valuable feedback, indicating that more visibility would be good for level completion and game over notifications. Probably outside the scope of the post-jam tidying that I’m doing currently (as I’m already pushing the limits of that), but definitely something I want to add in the future, likely before 1.0 👍