Part of draw not exported to pdf

Hi,

Some parts of my Draw file are not exported to PDF.
In the file at https://we.tl/t-L6rEkx8TUK there’s a squarish grey area at the top left that is exported. But the other three grey rectangles on the right are not.

I’ve already removed my profile, uninstalled all libreoffice* packages, rm -fr /usr/lib/libreoffice.

Is it still only a problem of my system?
What to do?

There is no problem with me: LibreOffice 6.3.6.2 (x86); OS: Windows 6.1.

Share your operating system and LibreOffice version. To do that, choose menu Help - About LibreOffice, copy from there, press edit below your question and paste.

Seems to be a problem starting with LibreOffice 6.4. On my test system export to PDF works using 6.3.6.2 but not on 6.4.6.2 and 7.0.1.2.

My version is 7.0.1.2, on a 64 bit Linux system, but right now, I’ve updated the packages and libreoffice is having a fatal exception signal 6 - terminate called after throwing an instance of ‘com::sun::star::uno::RuntimeException’