This is very odd as we strive for printing backwards compatibility. The text fields in question, what font are they using? Can you share a prn file so we can compare and look into it?
I recently took over the tag printing responsibility from an employee who just left. I believe the C# code he left me is an older version which use smaller font size. I will update the C# code to make it work. However, thank you very much for looking into my question!