cursorPosition by default contains a length of text

Quotation from help:

cursorPosition : int
This property holds the current cursor position for this line edit.
...
By default, this property contains a value of 0.

Actually cursorPosition value contains a length of text. That causes QLineEdit showing end of text which is not expected behaviour.

setText always passes -1 for cursorPosition

void setText(const QString &txt) { internalSetText(txt, -1, false); }

internalSetText, pos is -1:

m_cursor = (pos < 0 || pos > m_text.length()) ? m_text.length() : pos;