Unknown email address in my auto fill?
I was logging into an app on my phone and my email address along with another address I don’t recognize appeared in the autofill options. To be clear, this has never happened before. I logged into this app maybe a month or two ago with no issue and now this random person is in my autofill. I don’t recognize / do not know this person or this email, and absolutely no one aside from myself has touched my phone to check their email or use this app. The only apple product I have is my phone.
I checked my own contact card and the only email address there is the one I use. Out of curiosity, I went to my mail app to see if maybe I got an email from this person a long time ago and it just saved it for some reason, but while they automatically show up as though they are somewhere in my inbox, they can’t be found in any inbox. It’s really weird and I’m concerned as to why this is happening out of the blue. As a test, I logged out of another app and didn’t get that person, so I think it’s just for this one (for some reason?) any idea as to why this is happening?
iPhone 11, iOS 16