Line spacing of a multiline ReportField

I have a multiline ReportField in the Report Layout Editor.
I am unable to specify the space between the lines: whatever value I enter for the property “LineSpacing” in the inspector does not change the spacing between the lines on the printed report.
The behavior is the same whether the content of the field comes from the database (a long text without any special character) or it is specified in the “Text” property of the inspector (two or three words on different lines by using the Enter key on the keyboard, as a test).
WordWrap in the inspector is set to “ON”.
I’m on Xojo 2018r2 (for compatibility reasons).
How can I solve the problem? Thanks in advance.