I'm having an issue with the Portrait mode on my iPhone X. I used to take photos in Portrait mode, but recently it stopped working with the rear-facing camera. It still works in 'selfie' mode with the front-facing camera. I've restarted my phone many times and made sure it's fully up to date. I've also reset my phone multiple times, but Portrait mode is still not working with the rear camera. Does anyone know how to fix this issue or have any suggestions?