Sadly, I think it's going back. Having some random out of focus issues. I have mostly been using a 23mm f2 lens. Never had that with my X-Pro2. For example, in AF-S mode with distance scale displayed and shooting at a subject sort of 30 ft away I can see the AF choosing anything from 7ft, through 30 ft to infinity. Not always, though. I have AF priority set to 'focus', have tried different size focus boxes. My 35mm f1.4 is better but even with that one I don't think the images are as sharp are they should be. If I switch to manual focus and rely on peaking, I get some very sharp results. Pity ...
Lee