I think it is to straight to be a Die Crack. I would think it is more likely a Die Gouge. A Crack should go over raised designs, and a Gouge will go under.
I also believe it’s too straight to be a crack. But something is going on and a die gouge is most likely. In other words the die was scratched and when struck the metal flows into that scratch and is raised on the coin being struck. Nice little die chips. Good find.
It is possibly a Struck Through Debris. If there is no raised metal on ether side on the anomality. It looks to be incuse into the coin. Maybe a thread or something similar. Photo is not really clear enough for an accurate determination.