Aperture and shutter speed move together, even though I'm in

[SHIFSHIF]

After hours and hours with AI on this subject, I would really appreciate any help from anyone here.

I have a SONY A7 IV camera, and I'm looking forward to controlling the shutter speed and aperture separately. After all, M mode is for that.
Even though I'm in M mode, the aperture and shutter move automatically, and together.
What can I do?
This is so frustrating.

My apologies in advance for any small mistakes because I'm using Google Translate.

[Richard A]

Are you sure you’re actually properly in Manual Mode? Do you have ISO set to Auto? What lens are you using?

Edited 3 hours ago by Richard A