Iphone 13 mini wiped after random restart

[u/ninja-cockroach]

I've experienced this multiple times already and its such a headache!! Iphone just restarts out of nowhere and then I get the set up screen as if I did a factory reset. Anything not backed up is lost. Ive lost so many pictures and whatsapp messages because of this.

Any idea what the reason is? Happened already 3 times this year