QTextEdit does not show leftmost char after wordwrap

Having a QTextEdit
QTextEdit *e = new QTextEdit(0);
e->setWordWrapMode(QTextOption::WordWrap);
and I enter a long line so that a horizontal scrollbar is shown (e.g. press and hold a letter), then enter some spaces, then enter "abc".
The widget will do a word wrap and print "abc" in the second line, but the viewport is a little shifted to the right so what you see in the second
line is not "abc" but "bc" or a fragment of "a".

P.S:The same problem exists when using a Q3TextEdit