Regret to inform you that it almost certainly isn't a bug - the flash died. It's unrecoverable. Large numbers of pixel 3/3xl's have started dying in the last y

Regret to inform you that it almost certainly isn't a bug - the flash died. It's unrecoverable. Large numbers of pixel 3/3xl's have started dying in the last year and it looks like it's the flash wearing out on all the early adopter/heavy user devices. This happened to me too.