It really depends on how loud it is. If it's quiet, I'm pretty sure this is normal. I can hear mine making a faint whirring sound (kind of like a fan) when I am right up against the camera, but not when further back. I've seen this mentioned about the x-t4 as well when I was initially doing research deciding on a camera. The best explanation I saw was you cannot truly turn ibis off, when disabled the magnets have to hold the ibis in place to prevent it from moving, as a result the ibis system is still energized to some degree.