Question strange pattern in the photo

[hwrtyr]

I accidentally took a photo without the flash, then I brightened it and there is a strange pattern in the photo. I did it again and another strange pattern. I looked it up online and can't find anything. Do you have any idea what it may be?
https://ibb.co/VghdpdH

20220703-234539 hosted at ImgBB

Image 20220703-234539 hosted on ImgBB

ibb.co

https://ibb.co/KhhyqYg

 

[hang-the-9]

Not sure what you mean exactly by "strange pattern". If you are talking about the grain looking bright and dark areas, that is normal for a sensor in low light, depending on what the image is.

 

[hwrtyr]

The sensor shouldn't show up in the photo though. It only happens sometimes also.