I am using Nikon D5300 with AF-P Nikkor 18-55mm lens in the manual mode. While changing the shutter speed, it automatically and simultaneously changes the aperture. I find this to be very strange, since I should be able to change the aperture and the shutter speed separately in the manual mode. It can not possibly be auto exposure correction as making the shutter faster, actually simultaneously decreases the aperture from f/3.5 to f/4.
Is this a bug or something ? Has anyone else too faced it ?