Here are some of the issues that could be addressed in the rumored Nikon D500 firmware update:
If you play back picture continuously by holding the play button you will get an error message “XQD this memory card cannot be used. Card may be damaged. Insert another card.” and the camera is locked. As a work around you have to switch off the power, wait a few seconds and switch on again. After that the memory card can be used again and you can display the pictures again. This bug was only observed with the build in EN EL 15 battery. The problem was not observed with the EN EL 18 battery.
If you have experienced any other D500 issues, please add them in the comments section below.