The FileName and FileDateTime under Media metadata was showing some unexpected values and I just tried it with my own image and it does appear to have different values for name and a numeric string for the DateTime.
Specifically, the file name is a PHP temporary file name and the date/time appears to be in Unix timestamp form.
Filename looks good. I’m still seeing the Unix timestamp? (See screenshot)
Oops, forgot to push the date/time formatting code. It's in develop now.