LO --convert-to pdf makes transparent png black

I have a docx where i have a transparent png inside and i convert it via command line on linux to pdf. This image is displayed black then. LO Version 6.4

libreoffice --headless --convert-to pdf test.docx --outdir /pdf

Is there any option i can add, that the image will still be transparent? Or is this a bug in LO?

Or is this a bug in LO?

Search here: https://bugs.documentfoundation.org/

Or is this a bug in LO?


“this”? @kompilainenn, you can delete this comment.

why? the problem in this question is a really bug in LO

@kompilainenn, My first comment (and this one, that you also can delete) was because I don’t understood what do you want to say with “this”. So if your answer is “is a really bug in LO”, add it to the answer, and delete my comments. Thanks.