So, I got myself a barely used XF90 a few weeks ago. I really love this thing. The sharpness at f2 is just mad!
I noticed one problem however, and I'm not sure if it's the lens or a body firmware thing: If I have focus close to infinity, and want to focus on something close (using zone focus), the camera appears to grab focus on the close subject, but the subject remains out of focus. A repeat focusing does not fix this. Change focus mode to single however seems to fix the problem.
Did anybody else notice this?