Hi Deyan, Welcome to the Forums,
I’m surprised to hear that disabling ‘Auto Exposure’ in the project settings doesn’t completely disable it everywhere.
I tried to reproduce this, but when I pilot the camera, it looks the same as the default viewport. I also enabled ‘Exposure Compensation’ on the camera actors settings, and am seeing the changes in the preview window + when the camera is piloted.
Try sending your screengrabs again.