Context sensitive help shows wrong position of page

When I place the cursor on some Qt code and hit F1 to get context sensitive help, Creator shows me the right page of the documentation but scrolls to a wrong position. I always have to scroll up a little.
This might be happening because some area of the pane is covered by the documentation's upper frame.

E. g. I'm at a line calling QLineEdit::clear(). By pressing F1 I get to the right page, but the wrong position (howitis.png). Instead, it should show the interface of the function (howitshouldbe.png).