Did you by chance have your car serviced right before you noticed?
No but it sat in my 2 car wide driveway for 10 days when I was on vacation.
I noticed the passenger mirror after work my first day back. Then the driver the second day.
I thought someone hit it but it was in the driveway and even then that would only explain the driver side which has open driveway next to it.
When I was gone it was 90 one day then 50 at night. Mb temperature swings? It is old I guess.