We think we have a fix for (at least one) of the crashes:
RH-55141 Crash after New Document creation on macOS Catalina
@curtisw found the culprit. We’re building and testing now. If that works, we will publish a new Release Candidate so y’all can check our work.
Just as a book-keeping note: we’d appreciate it if any new and different macOS Catalina problems were reported in separate topics.