Oh god Nikon that's incredibly embarrassing. Having to do a "yank" test on a £4000 item? Wouldn't it be classed as an open box product if an employee of some shop has to take it out and aggressively yank the strap before selling? Can't believe they are going down this road of offering ever more expensive products with worse quality control. Get your act together.
Can I buy one without the strap holders, I'll make do if it's cheaper!