Formula that refer to a NameRange does not update contents correctly

SBook book = SBooks.createBook("book1");
book.getBookSeries().setAutoFormulaCacheClean(true);
SSheet sheet1 = book.createSheet("SheetX");

SName name = book.createName("FOO");
name.setRefersToFormula("SheetX!A1:B2");

// test insert/delete cells
sheet1.getCell("A1").setValue(1);
sheet1.getCell("B1").setValue(2);
sheet1.getCell("A2").setValue(3);
sheet1.getCell("B2").setValue(4);

Assert.assertEquals("SheetX!A1:B2", name.getRefersToFormula());
Assert.assertEquals(10D, sheet1.getCell("D2").getValue());

// insert B1:B1
sheet1.insertCell(0, 1, 0, 1, true);
Assert.assertEquals("SheetX!A1:B2", name.getRefersToFormula());
Assert.assertEquals(8D, sheet1.getCell("D2").getValue());