The D500 DSLR camera is already officially discontinued, but today Nikon released another firmware update for that model:
Nikon D500 Firmware Update Version 1.31:
Fixed an issue that would, when pictures were taken with a flash unit attached, sometimes result in the flash not performing in accordance with the value selected for ISO sensitivity settings > Maximum sensitivity with flash after either of the following operations:
- Loading settings with Save/load settings > Load settings
- Switching photo shooting menu banks using Photo shooting menu bank
Note:
Performing a firmware update while the camera is affected by this issue will not in itself correct the problem. After performing the update, you will need to either:
- reset all setting using Reset all settings > Reset, or
- load previously-saved settings (if available) from the memory card using Save/load settings > Load settings.
Amazon still has a few Nikon D500 listings (mainly grey market and refurbished).