Thank you for your reply, much appreciated. Unfortunately I don't know where I could get another copy of this lens without buying it again.
It is as if the lens focuses a bit in front of the subject sometimes. It is possible that I already had this problem with the X-T4, but that the camera focused much slower and therefore the effect was not as pronounced. I photograph dancers in low lighting conditions, which is hard for the autofocus of any make of camera (even full frame) to handle. The X-T4 is just so quiet and perfect for taking photos during live performances, but now with the fast sensor speed of the X-H2s, complete silent images are possible! It is like you say, this is a computer, but now on steroids.
My 50-140mm, 33mm f/1.4 and 90mm f/2 are all loving this new body. But the 56mm is now feeling like a rusted piece of squeaking machinery. Just wish that someone on here has had a similar experience with the 16-55 (well I don't really wish that upon anybody) and has a solution. Or maybe Fujifilm will release another firmware update soon?