Nikon D500 wildlife users

[MSnowy]

I've noticed since I got my d500 that it's under by 2/3 of a stop sometimes on cloudy gray days

 

[astroNikon]

I've noticed since I got my d500 that it's under by 2/3 of a stop sometimes on cloudy gray days

Are you able to reproduce that issue.
I did some test shooting last night and it's been overcast. The images are pretty good for overcast.

Maybe the metering mode? I used spot here.
20161221_D500test_Aircraft(overcast)-4 by Steve Sklar, on Flickr