TMSFMXRichEditor.InsertMultiLineText and style

Hello,

Why when I do :

  TMSFMXRichEditor1.BeginUpdate;
   lTextElement:=TMSFMXRichEditor1.InsertMultiLineText(AMultilineText);
   lTextElement.FontStyle:= [TFontStyle.fsBold];
   lTextElement.LeftIndent:=15;
  TMSFMXRichEditor1.EndUpdate;

Only the last line of is in bold ?