The above post is very good and very thorough.
Funnily enough I had exactly the same problem the other day and discovered that the EV was set to -3.0. Resetting it to 0.0 solved the problem, of course.
I do not know how the setting had become -3.0. I have many Anafi flights under my belt and know how and when to make any adjustments to the EV value. Just one of those things?!
Anyone new to the Anafi might not realise that even though you have the settings at Auto, the EV value can still be changed (intentionally or accidentally!).
Hope this helps someone.