In exactly the same conditions as in Issue 289, the BidiMode is made right to left, the Default Hint fails to appear. The reason for this is seems to be that the columns are right-aligned and the function GetColumnAndBounds returns column 0 on the left side where no columns are present. This is wrong. I found this when fixing the issue 289. However, since this function is used in many places, it has to be inspected very carefully before fixing.