iPhone shutdown automatically as soon as I step outside and it’s not cold outside
So when I go outside in the sun my iPhone 8 Plus just automatically shutdown but then when I walk back in the house it just turns back on like it don’t take a minute to power back on like if you do a normal reset. The phone just automatically turns off as soon as I step outside in the sun and it’s not like I’ve been out there for a minute and it doesn’t give me an overheating warning so could it be? Is it something wrong with the battery? Is it something wrong with the new update? I’m really mad that my phone does this and I did a reset so many times it’s unbelievable. Can someone help me fix this?