That's a weird one...
I've looked at the pix closely for mismatches in the grain, and couldn't see any. That would lead me to think it was a booger in the finish, rather than slots that were cut wrong and then filled.
I've looked at the pix closely for mismatches in the grain, and couldn't see any. That would lead me to think it was a booger in the finish, rather than slots that were cut wrong and then filled.