Quoted from PACMAN:Not trying to stir things up, just want to know if this is now considered the norm.
If you do a bit of pounding and stapling near the inserts it can happen.
It can also happen anyway regardless of that but if you didn’t notice before you started building only after it could be from the building process.
I have seen it right out of the box and also not until after assembly so it can go either way. One of the many reasons I have gotten away from stapled braid on playfields.