Since you probably have a free return window, I'd first try it and return it if you have the same problem. It seems that there are also people whose Pro 7 works just fine, I just don't know why it has this bug for some.
However, keeping it if it works might still pose a risk as this particular bug can't really be forced, it happens sometimes but not every time you use the rear camera, so you just have to assess your risk taking individually.
(Also maybe consider the Pro 7+ or Pro 8 as those are better in some aspects, but of course they cost more, too)