redraw/redrawLabels not working

System

I have noticed that if I have code such as the following:

IWDatacapture.gotoPage( 1 );
IWDatacapture.getItem( "/field" ).setFocus();
IWDatacapture.getItem( "/field" ).setValid( false );
IWDatacapture.setHighlightMode( true );
IWDatacapture.redrawLabels();

Whether the last line is redraw or redrawLabels, sometimes the form does not redraw correctly. If I use the following instead, it seems to work.

setTimeout( "IWDatacapture.redrawLabels();", 200 );

I am not sure what the cause is but I thought someone else might find this useful.