That last shot you posted makes it look like a lamination error that detached.
Edit: coming back to this I'm almost positive this is a lamination peel. The surfaces are inconsistent and not straight. There is a wavy wood grain like appearance, similar to split wood. If this were damage I would expect to see a relatively even surface, especially given how small the area in question is. Also, it's goes not appear to have any displaced metal, no shiny raised areas throughout the area in question. Also notice the "cracks" notated with arrows. This look like an additional laminate that wasn't removed. Picture pulling apart layers of string cheese, similar appearance and concept, but better tasting than
Morgan dollars.

Edited by Ty2020b
02/04/2022 1:18 pm