Random remote start

Hi there,
I have a 2018 Malibu with a normal factory FOB. I don’t have the little circle arrow button for remote start. I’ve noticed whenever I “lose” my car and press the lock and unlock buttons to try and find my car by the light my car has remote started. I love this, because I live in Michigan where it’s cold. I just don’t know how to do it on purpose. Has anyone had this come up?

For reference, I bought my Malibu used, so maybe the previous owner like...programmed the FOB? I’m not sure.