mapper.Take<T>() adding invalid, null row to collection

[boney0002]

I'm not sure if I'm doing something wrong, but if I am I don't see where. I am reading in an excel spreadsheet, and using mapper.Take() to map to my class, then doing some validation on each row. The mapper is returning an invalid null row with a row number that does not even exist in my spreadsheet. I go from a valid row, row number 8, to invalid null, row number 11.

Screenshot:

[Donny Tian]

please try with the latest version as we upgraded the NPOI version