Most if not all have the same feature. I know Minolta, Sony A mount, Nikon, Konica, Leica, all have this feature. It allows the user to switch from A to S and keep the same compensations.
It must be something like that. But I’m talking about reset when you turn the camera off. I agree it should keep the EV setting while you switch exposure modes with the camera on.
Anyhow, fixed it with the b2 custom setting. It was the default setting that caused the problem. This is a new camera and that was the first time I used the EV setting for a group of images.