problem in print pdf with HtmlViewer

Hello,
I have a problem with the HtmlViewer to print a PDF document (using WebKit renderer) in Xojo 2015

I set the PDF document:

wndShowPDF.HTMLViewerWebKit.LoadURL(fileDaAprire.NativePath)

then I try to print in a click on a canvas:

wndShowPDF.HTMLViewerWebKit.Print(True)

from the printer I obtain only a blank page!
But, if I try to use “CTRL+P” or move the mouse on the pdf and start the print using the adobe button inside, I have my paper printed.
Is this a bug of Xojo 2015?

I tryed. In Xojo 2018, HtmlViewer.Print works!
So it’s a bug of Xojo2015 :frowning: