The back camera of my iPhone 8 plus is faulty. Hadn't tested it the first couple of days. Over the weekend, I wanted to take some pictures and the image was all blurry (front facing camera worked fine). Then it went dead completely (black display in the camera app).
Googled a bit and found out it might have been a third party app causing a conflict.
However, removing those apps didn't help. Even a factory reset didn't solve the problem.
So I'm sending it back today, they will send me a new one...