Bug in org/apache/pdfbox/multipdf/Overlay#overlay(specificPageOverlayFile)

path = e.getValue();
LayoutPage layoutPage = layouts.get(path);
if (layoutPage == null)
{
    PDDocument doc = loadPDF(path);
    layouts.put(path, getLayoutPage(doc));
    openDocuments.add(doc);
}
specificPageOverlayPage.put(e.getKey(), layoutPage);

path = e.getValue();
LayoutPage layoutPage = layouts.get(path);
if (layoutPage == null)
{
    PDDocument doc = loadPDF(path);
    openDocuments.add(doc);
    layoutPage = getLayoutPage(doc);
    layouts.put(path, layoutPage);
}
specificPageOverlayPage.put(e.getKey(), layoutPage);