LearnPress Import/Export Quiz corrupted after importing

Hey support,

I tried to export courses from my old website to my new website using the import/export plugin. The old versions are Learnpress 4.1.7.3.1 and Import/Export 4.0.1. I am not able to update. My new versions are Learnpress 4.2.5.9 and 4.0.3.

When importing/exporting courses, I get no error messages, everything works fine, but when I look at the course later on in my new website, the answers in my quizzes are missing. Is this a known bug? What can I do to import courses including quizzes and its questions and answers?

Thanks for any help!