The die was in its later die state when your coin was struck. I was wondering if the marks near the roof were caused by a die clash or in this case a breakdown of the die. Kind of a Progressive indirect Design Transfer of the base of the bust on the reverse die?

I know this is a cent image, but see how it transfers in that area of your last side by side image. I've not see the PIDT on a single squeeze die though. But that was what caused the die damage on the reverse die that struck your coin.