It seems like my half dollar has a small chunk of metal missing right by the P mint mark. My initial impression is delamination due to the coloring difference between the fields and the spot missing the metal. Apologies for the poor photos.
Definitely an error, IMO I agree with Paddy & Alurid with a small struck through debris error, but for lamination? Far too shiny for me to see lol! Either way, Coingrats!