Well, not necessarily, it depends on the lens design. The failure mode would be that for high field angles, the light doesn't get out of Lens 1 into...
This method of tiny spacers at the edge was used by early telescope objective makers. I have discovered them when renovating some about 10 years ago....
I've seen these advertised on eBay a few times...they seem to be a straight out counterfeit of the Bron ones. Do you have a genuine one to compare it...