What causes a suit chest to pucker, as in David Beckham's suit here? Is it humidity, or some other cause, and can it be solved by a good pressing? I believe the suit in the photo is a RLBL, which is full canvas, so I don't think it's a case of a delaminating fusing. I have a suit from the same brand with similar, vertical puckering in the identical spot, above the chest pocket. The fabric is very lightweight (I would estimate that it's an 7.5 or 8 ounce wool gabardine).
Doesn't seem to be a problem with all suits in the line. Here the chest is clean with a RLBL: