So I've done the same process as all my bats (circa 65) never seen this except a one off which was not pressed correctly...
Anyway, I've had a few comments from batmakers saying it's either a drying issue or storm damage.
Richard at B3 said he thought it was me taking a scuff off incorrectly...i explained this happened in the knocking in process and i was going to use it at a net (wqcked a hammer edge scuff on) then
@simonmay5 5old me to send it back..
So another call today, they have sanded the bat and slimmed the handle, bat to be posted tomorrow, will review it and see how it plays, but i do feel this bat could have further issues 😫