Intermittent focus control drop with fujinon lenses after ca

Hi All, I updated 2 UB G2 cameras at the weekend and am having issues with Fujinon lens focus control.
Lenses are ;
UA22 x 8BERD-S8
and
ZA17x7.6BERD
Focus control is Fujinon EPD-4A-E12A
So the focus randomly stops working, turn camera off and on again and it comes back. Obviously I'll need to roll back the firmware to the previous version. Could someone guide me through the roll back process?
Lenses are ;
UA22 x 8BERD-S8
and
ZA17x7.6BERD
Focus control is Fujinon EPD-4A-E12A
So the focus randomly stops working, turn camera off and on again and it comes back. Obviously I'll need to roll back the firmware to the previous version. Could someone guide me through the roll back process?