QTableView The text in cell painted incorrectly

Using the addressbook example in:

$QTDIR/examples/itemviews/addressbook

1. Press button "Add" and then dialog "Add a Contact" opens.
2. Input "a" into the field "Name" .
3. Input the following text into the field "Address".

a(newline)
b(newline)
c(newline)
d

4. "ab" is displayed if the height of the row is smaller than two lines of text.

The following is displayed when the height of the row is just two lines.

a
bc

So the one of the newlines are wrapped and the other text is not displayed.