I know someone who had a Stiga Infinity VPS and the top ply started delaminating. He sent it back, got another and the same thing happened again.
And sorry but, of course it is a quality control issue. If they have the right amount of glue on the plies before they laminate and they add the right amount of pressure and keep the pressure for the right amount of time, then, no matter how thin the top ply is, that will not happen. I think what is probably happening in production is that there are spots where--for some reason, with this particular blade and the specific gluing process they are using for that top ply--there is not enough glue. And so it delaminates at those spots.
Stiga has been making paper thin top plies on many many blades for many many years. That is one of the secrets to why their blades have such good feeling.
But, there is some quality control issue with the Infinity VPS that has caused many people to have the top ply to delaminate. It may also be a research and development issue where the glue they are using for that particular lamination isn't binding properly. But even if that is the case. That should be uncovered by quality control as well.
But Stiga is notorious for having bad quality control. However, the issue with Infinity VPS is bigger than most of their quality control issues.