When you use text in Paragraph mode, CorelDRAW alerts you when text is not fully fit on the frame.

Get used to observe the differences of the frame dotted lines. When dotted lines are RED it shows that some part of the text is "hidden" at the bottom of the frame.

Another way to observe this is the small triangle that appears at the bottom of the frame.

To make the adjustment of the text, you simply click on the triangle and drag the frame down until all the text is visible. Dotted lines will became BLACK.