Then you might be lucky with the stones. Both the Wienerberger and the Juwö stone have this deviation. How are they supposed to manage it differently if one stone is 36.5 wide at the bottom and 35.8 at the top or the things have a bulge in the middle?!
What does luck mean, here the experience of the shell builder applies. I was already told beforehand (incidentally as info) that he does not order bricks from factory Y at company X because that factory has quality problems and the bricks have deviations. Basically, it is not bad, but the plaster (inside and outside) becomes thicker and thus more expensive. If the OP builds with a general contractor, it is the GC’s problem (maybe the plaster will just be thinner in some places, who knows?!). If the OP builds with individual trades, the costs will be passed on to him one-to-one.