Activity import error output missing the column the error is about

e.g. Create an import file with an invalid date, something like this for Activities

Type,Subject,Contact,Date
2,something,13,2021-02-03 16

The error output will correctly flag the date column as invalid, but does not include it in the output:

"Line Number",Reason,Type,Subject,Contact,Date
1,"Invalid value for field(s) : Activity Date",2,something,13