Text selection in Preview doesn't work in Catalina
I updated my new MacBook Air to Catalina. Now I can't use the text edit tool in Preview with documents that have been created with Libre Office before the update. If I select text from a pdf made with Libre Office, and then paste it to any text processing program, it changes into numbers and special characters - no matter if I use "unformatted" or "formatted" pasting.
I updated my Libre Office, and exported text from a document created after that. That worked just fine in Preview. But the old ones are a serious problem. I have dozens of documents that have been created with Libre Office before the updates and then exported as pdf's, and now I can't copy their texts but have to rewrite each word. I will be 100 before I get my PhD done...
Any suggestions?
MacBook Air 13", macOS 10.15