It's the sad thing, OP used to be the best at this sort of thing, great software and always bang up to date.I updated my 7t pro. Whilst everything seemed ok initially, I noticed the selfie camera was no longer working and in the days that followed the rear camera stopped too. The camera app even failed to load.
Eventually I had to have a remote session with OnePlus, they flashed the phone to an earlier version of android but it only brought back the rear camera. Off for repair it's gone. All this persuaded me to get a new phone and once the OnePlus is back it'll be sold.
Strange how an update can make a device act so poorly.
Think I'll either get a Samsung next (pricey yes, bloated yes, but they work) or a Chinese phone via Amazon.