We have just tested and optimzed this lens. It works very well on Fujifilm X-Trans IV cameras.
Please watch the test video below:
We have also optimized AF-S 600/4G VR. Unfortunately, it doesn't work as stable as 500/4G on X mount due to the power supply limitation.
The next firmware release, i.e. v1.10, will include supports for these lenses as well as some of the other big primes.
Thank you for watching!