Transparent png not exporting to PDF correctly in Draw

[vokster]

I’m having an issue with exporting my project to PDF in Draw. I inserted several transparent PNG images into my project. When I goto export to a PDF, the alpha channel of the PNG images are becoming “corrupt” and Im getting black or white boxes around them. This doesn’t seem to happen if I uncheck everything default in the PDF menu. If I check the “reduce image resolution” box, then this happens every time. So it seems to be related to a reduction in resolution. Oddly enough, if I use the Microsoft Print to PDF option in the print menu, this will not happen. These are my specs:

Windows 10 Pro (x64) 21H2
LO 7.4.3.2 (x64)

[Hrbrgr]

Upload a reduced and anonymized Draw file here so that someone can examine it.

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[vokster]

For some reason I am not able to edit my original post. Any particular reason?

[EarnestAl]

Sometimes the server is down or goes down while you are writing and changes aren’t implemented. Try again now by clicking the pencil icon.

[Wanderer]

@vokster

export to a PDF, the alpha channel of the PNG images are becoming “corrupt” and Im getting black or white boxes around them

One mayor obstacle: The “archive”-types like PDF/A1 don’t allow transparency. So this must be unchecked.

[EarnestAl]

Having just tested reducing PSD and PNG from 300 dpi to 150 dpi on conversion I find it works for me for both images with these settings which were just carried over from the last thing I exported.