fontsize of the Math formula seems not work well

[YenseanHub]

NPOI Version

2.5.6

File Type

• DOCX

Issue Description

the fontsize of the Math formula seems not work well

 XWPFParagraph p3 = m_Doc.CreateParagraph();
 p3.Alignment = ParagraphAlignment.CENTER;
 
 var s = p3.CreateRun();
 s.SetText("asdadada");
 s.FontSize = 50;

 XWPFOMath math = p3.CreateOMath();
 var a = math.CreateRun();
 a.SetFontFamily("宋体", FontCharRange.Ascii);
 a.FontSize = 50;
 a.SetText("a");

the fontsize of the normal paragraph content works well,
but the fontsize of the math still the default size