KiCad 9.0.3
All of my reference designators are sized as 0.032 (0.8128 mm) inch in Eagle. I went back to the Eagle project and checked.
After import they vary in size. The default silkscreen text height is 0.8 mm, so the text should pass DRC.
DRC warnings report some text was 0.7193 mm so I reduced the constraint to 0.71 mm.
Still more warnings saying some text is still in violation so I reduced the constraint a little further.
Is this a bug?
Not only is the size incorrect, but it varies between components. I would expect text import to be deterministic.
Andrew