Java Builder - figure redraw

Hello, I have encountered a small issue with one of my JAR files generated by Java Builder: The function computes some iteration, opens a figure and plots the residue chart. Under the chart is a text field, where the current residue is diplayed via

set(handles.text, residue);
drawnow;

The code works in Matlab and works also as a stand-alone mcc compiled application.

However, when I generate the JAR file by the Java Builder and use the function, the chart is updated, but the residue is not displayed at all. If I resize the figure, the residue text field appears and updates properly.

Thank you for any help.