The latest firmware for the ZF is available here
https://downloadcenter.nikonimglib.com/en/download/fw/545.html
Fixed an issue that sometimes caused overexposure in the viewfinder and monitor shooting displays (live view) when the standby timer had expired then reactivated.
I have similar feelings about the ZF. For me it brings back the joy of photography again. My other cameras are M11 and Nikon film cameras. I regret getting rid of my MP which I loved. But now, If I shoot film it's on an F3T and an F6 which for me has the perfect metering of any camera ever made. I have the 50mm 1.8 Z for it and love it. Although, I love shooting my manual focus glass on it as well. With those two film cameras and my ZF I feel young again :) Who needs Centrum when you have film nikon cameras and and a ZF" 😄