LO Draw - Howto export document to PDF with transparent images

Hi Forum

I have a PDF document opened in LO Draw.

I add some transparent images (eg signatures saved as .png file) to the LO Draw document.

Viewing the document in LO Draw confirms the transparency of the images.

Then I Export as PDF.

BUT all the images have now lost their transparency.

I’ve searched the interwebs and it seems this bug has been around a while.

Does anybuddy know of a fix or workaround for this irritant ?

TIA’s for any tips or clues.