To David KM,
Thank you very much for posting the problem with the BR strap.
I have 3 RS7's and had to take a closer look after seeing this post.
I noticed that the knob and hole (blue circle Thanks to Jamesy)
is extensively worn out on my oldest and most used RS7 strap.
In given time, it will wear to the point it will be able to pass through.
Im not a pro shooter and average using that strap 1x a week for long walks or biking.
Comparing it to the newer BR7's I own, looks as if 50% of the nub has already worn away and the
strap is only about 1 1/2 years old.
Photography is my hobby and I will no longer trust this strap to support my expensive gear.
Thanks once again to David KM and everyone else who posted.