Hi pedri.uchiha,
Please tell me your firmware version and show me an original photo of the problem. This may help us greatly in making sure the problem you are describing.
Please upload the original photo to ASUS WebStorage (https://www.asuswebstorage.com/navigate/) and share the link with us.
Please tell me your camera settings you shot the picture in.
1) Screenshot the display before taking the photo to show the mode and focus settings.
2) Also screenshot the Camera settings page.
3) Indoors/outdoors/lighting/distance/...
Thank you for your help 🙂